WireGuard on mobile killing my battery but no clue why

R Revenant ·

WireGuard on mobile killing my battery but no clue why

R

Revenant

New member
Man I gotta vent a bit. So I switched to WireGuard on my phone thinking it's lighter and faster, right? But my battery life has turned into a joke lately. I mean, I'll leave my phone at 100% and an hour later it's down to 70. And I've tried turning it off, rebooting, all that. Nothing helps. Honestly, I'm about ready to ditch it for OpenVPN or smth else just to save my battery. Anyone else notice this? Or is it just me? I swear WireGuard was supposed to be more efficient but it's just draining my power like crazy. I'm stuck here trying to figure out if I missed some setting or if this is just how it is on mobile. Really frustrating cause it works great otherwise but that battery drain is killing me. Somebody had to experience this and found a fix, right? Please tell me I'm not crazy
 
38% battery drain in an hour is insane for a supposedly lightweight VPN, I've seen similar with WireGuard on some Android devices but no solid fix yet, maybe try disabling the keepalive setting or using a different app version?
 
Yeah, I get it, mobile battery drain with WireGuard can be wild. My tip is to check your keepalive settings, sometimes turning it off or lowering it helps a lot, especially if you're not constantly connected. ymmv tho, but worth a shot.
 
last month I was battling the same. That keepalive setting was the biggest culprit for me, turned it off and battery got a lot better.
 
honestly yeah, I call BS on that being solely WireGuard's fault. That kinda drain sounds more like background apps or maybe some misconfigured settings. Could be your device or some other app sucking juice. Ymmv but I'd look into what else is running in the background first.
 
Actually, I've been using WireGuard on mobile for months and it barely touches my battery, ymmv. Maybe it's smth specific to your device or how you've got it set up, but I honestly think blaming WireGuard itself is kinda off. Could be a misbehaving app or some other background process causing all that drain.
 
tbh fam, I'd bet it's not the VPN itself but the app's background activity. Try setting it to only connect on demand or when you open the app, see if that helps save battery
 
Nah, I dunno if it's just background activity, I think it's more likely the encryption and decryption happening constantly. My battery drops even with app on demand, so maybe it's just WireGuard doing heavy lifting in the background. Have you tried monitoring CPU usage with a battery app?
 
Actually I think it's not just encryption, more like the constant packet handling and rekeying that WireGuard does which can chew up CPU cycles. I saw my phone's CPU hit 40-50% sometimes even with low data transfer. if you want to keep battery, turn off persistent keepalive or tweak MTU to lower overhead.
 
yo switching WireGuard to auto-connect only when you actively use it can help cut down on background CPU cycles. I've seen my battery drain 10-15% an hour with it constantly running, even on low traffic. Also, check if your device is rekeying frequently; that can spike CPU usage, especially if you're on a flaky network.
 
careful with keepalive tho, if u turn it off, VPN might disconnect more often, especially if ur on flaky wifi or cell. i just lowered MTU and it helped a bit, but yeah, if u leave keepalive on, it will chew battery more lmao.
 
yo, glad im not alone lol, sometimes I just turn off auto-connect and reconnect manually when needed, feels like a small fix but really helps with battery.
 
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