[{"data":1,"prerenderedAt":273},["ShallowReactive",2],{"blog:vpn-battery-drain-fix":3},{"zh-CN":4,"en":148},{"blocks":5,"faq":132},[6,9,11,13,17,19,21,23,26,28,49,52,54,69,71,74,76,84,87,89,93,95,98,100,105,108,110,112,118,120,123,125,128,130],{"type":7,"html":8},"p","手机开着 VPN，电量掉得比平时快——这是真的，但耗电的大头几乎从来不是「加密」这一步，而是信号维持、断线重连，和后台应用继续跑在隧道里，这三件事加在一起的结果。",{"type":7,"html":10},"这篇不写电池百分比或者毫安时的具体数字：同一个设置在不同机型、不同信号环境下差出去两三倍很正常，写死一个数字只会误导人。往下看的是耗电具体发生在哪一步、iOS 和 Android 上分别该看哪个开关，以及怎么用手机自己测出差别，而不是凭感觉下结论。",{"type":7,"html":12},"排查原则很简单：\u003Cstrong>一次只改一个设置\u003C\u002Fstrong>。把后台刷新、省电模式、VPN 客户端一起改了再看效果，就算耗电真的降了，你也不知道是哪一步起的作用，下次换个手机又要重新试一遍。",{"type":14,"id":15,"html":16},"h2","bp-why","为什么开着 VPN 更耗电",{"type":7,"html":18},"VPN 建立的是一条要一直维持的隧道，手机的网络芯片没法像平时那样在两次收发之间彻底休眠，得时不时「醒」一下，把这条隧道保持在线。这部分耗电和有没有真的在传输数据关系不大，纯粹是「保持连接」本身的成本。",{"type":7,"html":20},"第二块是重连。信号变弱、在 Wi-Fi 和移动数据之间切换、App 被系统清理后台——任何一次断开都要重新走一遍建立隧道的过程，这一步比维持已有连接费电得多。断线次数越多，一天下来的耗电差距就越明显。如果设备本来就容易信号跳变，Wi-Fi 和移动数据之间怎么切换不掉线 值得先看一遍，能直接减少重连次数。",{"type":7,"html":22},"第三块最容易被误会：VPN 只负责把流量送进隧道，不会替你决定哪些 App 该在后台跑。开着 VPN 时，原本会被系统限制到几乎不活动的后台应用——云盘同步、订阅刷新、消息推送——可能因为网络看起来「正常」而继续干活，这部分耗电其实是应用自己的锅，跟 VPN 没关系。如果还没弄清楚 VPN 到底会不会更耗电、耗流量，那篇讲得更基础。",{"type":14,"id":24,"html":25},"bp-settings","iOS 和 Android，该看哪个开关",{"type":7,"html":27},"两个系统对「一直在线的 App」的管理方式不一样，值得分开看：",{"type":29,"align":30,"head":32,"rows":36},"table",[31,31,31],null,[33,34,35],"场景","iOS","Android",[37,41,45],[38,39,40],"后台活动怎么管","设置 → 通用 → 后台 App 刷新，只留真正需要的几个","设置 → 电池 → 应用耗电管理，把不需要保活的 App 设为受限",[42,43,44],"省电模式的影响","低电量模式会让系统更激进地暂停后台任务，不影响 VPN 本身，配合用能省更多","部分厂商的「超级省电」模式会连 VPN 客户端一起限制，导致更频繁掉线，可以单独给它加白名单",[46,47,48],"断线后什么算正常","重新连接时偶尔弹一次网络扩展确认，首次设置好之后不会再出现","系统对「一直保持连接的 App」可能有额外耗电提示，只是提示，不代表真的出了问题",{"type":14,"id":50,"html":51},"bp-fix","三个真正管用的调整",{"type":7,"html":53},"比起在各种「省电模式」之间来回试，下面这三处改完基本都能看出差别。",{"type":55,"items":56},"steps",[57,61,65],{"title":58,"body":59},"把 VPN App 从电池优化里放出来",[60],"听起来反直觉：如果系统把 VPN App 也当成「耗电大户」限制到后台待命，它反而会更频繁掉线，断了又重连才是真正费电的部分。把它加入电池优化白名单，让它能稳定维持连接，比让系统去「帮它省电」更省电。",{"title":62,"body":63},"减少不必要的重连次数",[64],"信号本来就弱的地方——电梯、地库、高铁隧道——与其让 App 反复重试连接，不如先切到信号稳定的网络再连。每一次重连都要重新走一遍建立隧道的握手，次数少了，耗电自然降下来。",{"title":66,"body":67},"分清「要保活」和「不用保活」的场景",[68],"只是刷网页、看消息，锁屏后断开完全没问题，下次用的时候重新连，几秒钟的事。真正需要保活的场景不多——等一个大文件下载完，或者通话软件要随时能接听——只在这些场景里手动保持连接，其余时间放手让它断开，省下的是长时间锁屏后台维持隧道的那部分电。",{"type":70},"downloads",{"type":14,"id":72,"html":73},"bp-measure","自己动手测，不靠感觉",{"type":7,"html":75},"想知道自己的手机具体差多少，不用装额外工具，四步就能比出来，比只看电池百分比准得多。",{"type":77,"items":78,"ordered":83},"list",[79,80,81,82],"记下开始时的电量和时间，开着 VPN 正常用手机一小时——刷动态、看视频都算正常使用，不用刻意少用。","记下一小时后的电量，算出这一小时掉了百分之多少。","关掉 VPN，用同样的方式再用一小时，同样记下掉了百分之多少。","两个数字一减，差出来的才是 VPN 真正加的那部分——多数情况下比想象中小；如果差距很大，问题通常出在频繁重连或某个后台 App，不是 VPN 本身。",true,{"type":14,"id":85,"html":86},"bp-distinguish","测完之后，怎么判断该不该继续怀疑 VPN",{"type":7,"html":88},"前面那个一小时对比测出来的差值，是判断该往哪个方向查的分界线，不是随便测一下就下结论。",{"type":77,"items":90},[91,92],"两次差值很小：说明 VPN 本身没有额外拖累多少电。这时候电池还是掉得比想象中快，方向该换成手机本身——查一下最近有没有新装的 App 在后台反复刷新，或者电池本身用了两三年、容量已经不如从前，这些跟 VPN 完全无关，继续调 VPN 设置不会有效果。","两次差值确实很大：才轮到怀疑连接本身，先看是不是频繁掉线重连造成的，翻回前面的设置检查一遍，而不是直接换一家服务商。换了三四款 App 结果都差不多，大概率也不是某一款的问题，是所在环境信号本身就不稳定，换哪个 App 都会遇到同样的重连频率。",{"type":7,"html":94},"分清这两种情况，才不会把设备自己的问题算在 VPN 头上，也不会把真正的连接问题误认成是手机不行。",{"type":14,"id":96,"html":97},"bp-pitfalls","容易走偏的几个想法",{"type":7,"html":99},"排查耗电问题时，有几个方向一开始就想错了，白花时间。",{"type":77,"items":101},[102,103,104],"以为耗电等于「这个 VPN 不行」，换了三四家还是一样——耗电大头是设备自己的后台管理方式，不是隧道那一端的问题。","只盯着电池百分比掉得快，没注意到自己正好在信号差的地方；电梯、地库、高铁隧道里不管开不开 VPN 都费电，VPN 只是被冤枉背了锅。","为了「保险」手动打开后台保活权限，结果系统对它更宽松，该省电的时候也不省，越保活越费电。",{"type":14,"id":106,"html":107},"bp-support","联系客服前，先把这几项记下来",{"type":7,"html":109},"如果按前面的方法测过，确定差值确实偏大，联系客服时带着数据去问，比只说「特别费电」能更快找到原因。",{"type":7,"html":111},"值得先记下来的几项：",{"type":77,"items":113},[114,115,116,117],"一小时对比测出来的具体百分比差值","手机型号和系统版本","当时连的是哪个地区的节点","耗电偏快主要发生在锁屏之后，还是正常使用的时候，用的是 Wi-Fi 还是移动数据",{"type":7,"html":119},"这几项合在一起，基本能让客服判断是某个节点的问题，还是设备本身的耗电管理有关。把这些信息带去\u003Ca href=\"\u002Fcontact\u002F\">联系客服\u003C\u002Fa>，比事后凭感觉描述「电掉得很快」更容易得到具体的答案。",{"type":14,"id":121,"html":122},"bp-stable","长期怎么更省电",{"type":7,"html":124},"真正能长期减少耗电的，是让客户端自己处理好重连，而不是靠你来回手动切换。\u003Ca href=\"\u002Ffeatures\u002F\">快橙\u003C\u002Fa> 断线后会自动重连，换节点也是一步到位，不需要手动重试——重试才是耗电的大头。如果连接本身就断断续续、不只是费电这么简单，先看 \u003Ca href=\"\u002Fblog\u002Fvpn-connected-but-no-internet\u002F\">VPN 连不上网的排查顺序\u003C\u002Fa> 更有用。",{"type":14,"id":126,"html":127},"bp-final","总结",{"type":7,"html":129},"手机开着 VPN 确实会多耗一点电，但耗的大头是维持连接和反复重连，不是加密运算本身。三处真正管用的调整——把 VPN App 从电池优化里放出来、减少不必要的重连、只在真需要保活的场景手动保持连接——比任何「省电模式」都直接。",{"type":7,"html":131},"想知道自己手机具体差多少，拿上面那个一小时对比测试跑一遍就有答案，不用猜。\u003Ca href=\"\u002Forder\u002F\">快橙\u003C\u002Fa> 支持 iOS、Android、Windows 和 macOS，注册后每天有免费试用时长，先测出差别，再决定要不要长期用。",[133,136,139,142,145],{"q":134,"a":135},"开着 VPN 一定比不开更费电吗？","会多耗一点，但主要来自维持连接和偶尔重连，不是加密运算本身。手机上的加密大多走硬件加速，负担很小；真正的耗电大头是信号维持和重连频率。",{"q":137,"a":138},"换成速度更快的线路，会更费电吗？","速度和耗电不是一回事。更快的线路通常是让同样的下载更快结束，屏幕和后台维持连接的时间反而更短，实际耗电未必更高。",{"q":140,"a":141},"锁屏之后要不要让 VPN 保持连接？","看用途。只是等消息、不下载大文件，断开更省电；如果有任务需要一直在线，比如同步或通话提醒，断开又重连反而更费电。",{"q":143,"a":144},"频繁换节点会不会突然更费电？","每次重新建立连接都要多做一轮握手，短时间内连续换节点确实有个小峰值，但只是几秒钟的事，不会一直持续。",{"q":146,"a":147},"快橙在这件事上能做什么？","断线后自动重连、换节点一步到位，减少你手动重试的次数——重试才是耗电的大头。想先看看自己手机上差多少，注册后每天有免费试用时长。",{"blocks":149,"faq":257},[150,152,154,156,158,160,162,164,166,168,185,187,189,203,204,206,208,214,216,218,222,224,226,228,233,235,237,239,245,247,249,251,253,255],{"type":7,"html":151},"Your phone's battery does drop faster with a VPN running — that part is real. But the biggest cost is almost never encryption itself. It's three things added together: keeping the connection alive, reconnecting after a drop, and background apps that keep running inside the tunnel.",{"type":7,"html":153},"This won't give you a battery percentage or a milliamp-hour number: the same setting can differ two or three times over between phone models and signal conditions, so a fixed number here would just mislead you. What follows is where the drain actually happens, which switch to check on iOS versus Android, and how to measure the real difference on your own phone instead of going by feel.",{"type":7,"html":155},"The rule for testing any of this: \u003Cstrong>change one setting at a time\u003C\u002Fstrong>. Adjust background refresh, battery saver, and the VPN client all at once, and even if the drain drops, you won't know which change did it — and you'll be starting from scratch on the next phone.",{"type":14,"id":15,"html":157},"Why a VPN drains more battery",{"type":7,"html":159},"A VPN keeps a tunnel open continuously, so the phone's radio can't fully sleep between sends and receives the way it normally would — it has to wake up periodically just to keep that tunnel alive. This part of the drain has little to do with whether data is actually moving; it's purely the cost of staying connected.",{"type":7,"html":161},"The second piece is reconnecting. Weak signal, switching between Wi-Fi and mobile data, the app getting cleared from background by the system — any of these forces a fresh handshake to rebuild the tunnel, and that costs far more than simply maintaining an existing one. The more times a connection drops, the bigger the difference shows up by the end of the day. If your phone tends to bounce between signals often, switching between Wi-Fi and mobile data without dropping the connection is worth reading first — it directly cuts down how often this happens.",{"type":7,"html":163},"The third piece is the one people misread most: a VPN only routes traffic into the tunnel, it doesn't decide which apps run in the background. With the VPN on, apps the system would otherwise throttle almost to a stop — cloud sync, subscription refreshes, notification polling — may keep working because the network looks "normal" to them. That drain is really on the app, not the VPN. If you haven't settled the more basic question of whether a VPN increases battery and data use at all, that piece covers it from the ground up.",{"type":14,"id":24,"html":165},"Which switch to check: iOS vs. Android",{"type":7,"html":167},"The two platforms manage "apps that stay connected" differently, so it's worth checking them separately:",{"type":29,"align":169,"head":170,"rows":172},[31,31,31],[171,34,35],"Situation",[173,177,181],[174,175,176],"Managing background activity","Settings → General → Background App Refresh — keep only what you actually need","Settings → Battery → App battery usage, set anything that doesn't need to stay alive to restricted",[178,179,180],"How battery saver interacts","Low Power Mode pauses background tasks more aggressively; it doesn't touch the VPN itself, and using both together saves more","Some manufacturers' "extreme battery saver" modes restrict the VPN client along with everything else, causing more frequent drops — worth whitelisting it separately",[182,183,184],"What counts as normal after a drop","A network extension confirmation may pop up once on reconnect; it won't reappear after the first setup","The system may show an extra battery warning for "apps that stay connected" — it's just a notice, not a sign anything is actually wrong",{"type":14,"id":50,"html":186},"Three adjustments that actually help",{"type":7,"html":188},"Rather than cycling through battery saver modes, these three changes are the ones that reliably show a difference.",{"type":55,"items":190},[191,195,199],{"title":192,"body":193},"Take the VPN app out of battery optimization",[194],"This sounds backwards: if the system treats the VPN app itself as a battery hog and restricts it in the background, it ends up dropping more often — and reconnecting after a drop is the part that actually costs battery. Whitelisting it in battery optimization so it can hold a stable connection saves more power than letting the system "help" by restricting it.",{"title":196,"body":197},"Cut down on unnecessary reconnects",[198],"In places where the signal is already weak — elevators, underground parking, a high-speed rail tunnel — retrying the connection over and over costs more than switching to a stable network first and connecting once there. Every reconnect means another handshake to rebuild the tunnel; fewer of them means less drain, plain and simple.",{"title":200,"body":201},"Separate the situations that need to stay live from the ones that don't",[202],"If you're just browsing or checking messages, disconnecting after the screen locks costs nothing — reconnecting next time you pick up the phone takes a few seconds. The situations that genuinely need to stay live are rarer than people assume — finishing a large download, or a calling app that needs to ring at any moment. Keep it connected on purpose for those, and let it drop the rest of the time; that's where the real savings from not holding a tunnel open all night come from.",{"type":70},{"type":14,"id":72,"html":205},"Measure it yourself instead of guessing",{"type":7,"html":207},"You don't need any extra tools to see the actual difference on your phone — four steps, and it's far more reliable than watching the battery percentage.",{"type":77,"items":209,"ordered":83},[210,211,212,213],"Note the time and battery level, then use your phone normally with the VPN on for one hour — scrolling and video count as normal use, don't deliberately go easy on it.","Note the battery level an hour later and work out the percentage drop.","Turn the VPN off, use the phone the same way for another hour, and note that percentage drop too.","Subtract the two numbers — that difference is what the VPN actually adds, and it's usually smaller than people expect. If the gap is large, the cause is almost always frequent reconnects or a background app, not the VPN itself.",{"type":14,"id":85,"html":215},"After measuring, how to decide whether to keep suspecting the VPN",{"type":7,"html":217},"The gap from that one-hour comparison is the actual line for deciding which direction to look next, not something to eyeball once and move on from.",{"type":77,"items":219},[220,221],"The gap is small: the VPN itself isn't adding much of a real cost. If the battery is still draining faster than expected, check the phone itself instead — whether a newly installed app is refreshing repeatedly in the background, or the battery is a couple of years old and holding less charge than it used to. Neither has anything to do with the VPN, and adjusting VPN settings further won't change either one.","The gap is genuinely large: that's when the connection itself is worth suspecting. Check whether frequent drops and reconnects are the cause first, going back through the settings above, rather than switching providers outright. If three or four different apps all show a similarly large gap, it's unlikely to be any one app's fault — the signal in that location is simply unstable, and any app would end up reconnecting just as often.",{"type":7,"html":223},"Keeping the two apart avoids blaming the VPN for something the device is doing on its own, and avoids writing off the phone when the connection is the actual problem.",{"type":14,"id":96,"html":225},"A few ideas that send you down the wrong path",{"type":7,"html":227},"A handful of assumptions about battery drain are wrong from the start, and chasing them just wastes time.",{"type":77,"items":229},[230,231,232],"Assuming the drain means "this VPN is bad" and switching providers three or four times without any change — the biggest cost is how the device itself manages background apps, not anything happening on the tunnel's other end.","Watching only the battery percentage drop and not noticing you're somewhere with weak signal — an elevator, underground parking, a train tunnel drains a phone regardless of whether a VPN is running; the VPN just takes the blame.","Turning on background "keep-alive" permissions manually just to be safe, which makes the system go easier on the app exactly when it should be saving power — the more you try to keep it alive, the more it drains.",{"type":14,"id":106,"html":234},"Before contacting support, note these down",{"type":7,"html":236},"If testing the way described above confirms the gap really is large, bring the numbers to support instead of just saying "it drains the battery a lot" — it gets to an answer faster.",{"type":7,"html":238},"Worth noting first:",{"type":77,"items":240},[241,242,243,244],"The exact percentage gap from the one-hour comparison","The phone model and system version","Which regional node was connected at the time","Whether the faster drain happens mainly after the screen locks or during active use, and whether it was on Wi-Fi or mobile data",{"type":7,"html":246},"Together, this is usually enough for support to tell whether it's a specific node or something in how the device manages power on its own. Bringing this to \u003Ca href=\"\u002Fen\u002Fcontact\u002F\">support\u003C\u002Fa> gets a more specific answer than describing "the battery drops fast" after the fact.",{"type":14,"id":121,"html":248},"What actually helps long-term",{"type":7,"html":250},"The real long-term fix is letting the client handle reconnecting on its own instead of you switching things manually back and forth. \u003Ca href=\"\u002Fen\u002Ffeatures\u002F\">FastOrange\u003C\u002Fa> reconnects automatically after a drop and switches nodes in a single step, so there's no manual retrying — and retrying is where most of the drain comes from. If the connection itself keeps cutting out and battery is only part of the problem, \u003Ca href=\"\u002Fen\u002Fblog\u002Fvpn-connected-but-no-internet\u002F\">this troubleshooting order for a VPN that won't get online\u003C\u002Fa> is the more useful read.",{"type":14,"id":126,"html":252},"In summary",{"type":7,"html":254},"A VPN running on your phone does add some battery drain, but the bulk of it comes from keeping the connection alive and reconnecting, not from the encryption itself. Three changes actually move the needle — take the VPN app out of battery optimization, cut down on unnecessary reconnects, and only keep it deliberately connected for the situations that truly need it — and all three beat any generic battery saver mode.",{"type":7,"html":256},"To see exactly how much difference it makes on your own phone, run the one-hour comparison above — no need to guess. \u003Ca href=\"\u002Fen\u002Forder\u002F\">FastOrange\u003C\u002Fa> supports iOS, Android, Windows, and macOS, and every registered account gets free trial time daily, so you can measure the difference before committing to anything long-term.",[258,261,264,267,270],{"q":259,"a":260},"Does a VPN always drain more battery than no VPN?","A little, yes, but mostly from keeping the connection alive and occasional reconnects, not the encryption itself. Encryption on a phone mostly runs on hardware acceleration, so it barely costs anything; the real drain comes from staying connected and how often it reconnects.",{"q":262,"a":263},"Does switching to a faster line drain more battery?","Speed and battery drain are not the same thing. A faster line usually means the same download finishes sooner, so the screen and background connection stay active for less time — the actual drain is often not higher at all.",{"q":265,"a":266},"Should the VPN stay connected after the screen locks?","Depends what you need. If you're just waiting on messages and not downloading anything large, disconnecting saves more power. If something needs to stay live — syncing, a call you might need to pick up — disconnecting and reconnecting later costs more than leaving it on.",{"q":268,"a":269},"Does switching nodes often suddenly spike battery use?","Every new connection means another handshake, so switching nodes several times in a row does cause a small, brief spike. It only lasts a few seconds and does not carry on afterward.",{"q":271,"a":272},"What does FastOrange do about this specifically?","It reconnects automatically after a drop and switches nodes in one step, which cuts down on the manual retries that actually cost the battery. To see the difference on your own phone first, every registered account gets free trial time daily.",1793379456840]