WireGuard on mobile battery drain - my tests

P Pace ·

WireGuard on mobile battery drain - my tests

P

Pace

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So I've been running WireGuard on my phone for a year now, kept it active all day. I'm usually on the OpenVPN side of things but I figured I'd test the hype. And honestly, I gotta warn people, the battery impact is way bigger than I expected. My setup was an iPhone 13, Mullvad app, WireGuard protocol always connected. I tracked the battery usage over a week with no VPN and then with WireGuard. Baseline drain was about 8% per hour of typical use (email, browsing). With WireGuard active, that jumped to 12% per hour. That's a solid 50% increase in battery consumption just for having the tunnel open, even when you're not actively transferring huge amounts of data. I suspect it's the constant connection state management, maybe the keep-alive pings. I know WireGuard is faster and all that, but if you're using your phone as a primary device and you keep the VPN on 24/7 like some privacy folks do, you're gonna notice your battery dying way earlier in the day. I switched back to IKEv2 for mobile and the drain went back down to normal. Just smth to consider if you're planning a full-time mobile VPN setup. ymmv depending on your phone model of course
 
Different angle: I've actually noticed the same thing on Android with WireGuard. I used it for a couple of months, and the battery drain was noticeable, especially on older devices. Switched back to OpenVPN and the drain got better. ymmv but I think WireGuard's always-on nature does eat up power more than some realize.
 
Yup rn I've seen similar on Android, even newer flagships. Like you said, constant keep-alive pings and connection management can really hit the battery. Some tweaks like reducing ping frequency or switching protocols could help, but it's a trade-off if you need that speed and privacy 24/7.
 
ever tried tweaking the keep-alive settings on WireGuard? reducing ping intervals or disabling them if possible can help a bit with battery, right? some of the newer Android apps have more options to tune that stuff. just wondering if you played with those on iPhone?
 
yep exactly, that constant pinging on WireGuard can really eat up the battery no matter what phone you got. one trick I found is setting the keep-alive interval to the max or turning it off if you can, might squeeze out some extra juice. not perfect but better than draining your whole day just to stay connected
 
Ever thought about using split tunneling? maybe you don't need the VPN on all the time, that way you save some juice. or just turn it off when not super paranoid. not perfect but better than drain city.
 
Last month I tested WireGuard on my Pixel 6, kept it on 24/7 too, and yeah the battery drain was noticeable. I ended up just turning it on only when I needed privacy or was on untrusted networks. Honestly, for daily use I prefer toggling it manually now, save some juice. If u want constant VPN, maybe look into custom keep-alive tweaks or split tunneling.
 
Ever try playing with the keep-alive settings? I found bumping it to the max or turning it off completely can make a difference. ymmv but it's worth a shot if you're trying to squeeze out more battery life
 
different angle: I've actually seen quite the opposite. On my S21, WireGuard barely makes a dent on battery life. I think the impact can vary a lot based on the device's hardware and background process efficiency. Maybe iPhone's always-on VPN handling isn't as optimized? ymmv, but I'd test on your specific hardware before switching away from WireGuard for good. stay sharp
 
Appreciate the feedback, guys, it's good to see I'm not just imagining things. I'll definitely try tweaking the keep-alive settings, maybe set longer intervals or turn them off if possible, see if that helps. If anyone finds a sweet spot that balances battery and stability let me know, ymmv.
 
Yep exactly, I've found wireguard actually pretty efficient on battery, not the drain monster some say. Might be your config or maybe other apps messing with it, dunno. But in my tests, it's been pretty lightweight.
 
55% battery left after 4 hours, wireguard barely moved the needle for me. Do you use any specific app or tweak configs? YMMV but I feel like some configs might hit differently
 
been messing with wireguard on my phone for a bit and honestly it's not as bad as ppl say unless u got a crazy config or other apps fighting it, just my 2c.
 
yo haha, I swear sometimes VPNs just wanna drain ur battery for fun. Been using wireguard on mobile too, and honestly it's not bad if ur configs are chill. YMMV tho, some setups might hit diff.
 
just my 2 cents, I ran tests with a few configs and noticed battery drain ranged from 5% to 15% over 6 hours, so it really depends on your setup. some apps like background sync or auto-updates can also amplify drain
 
last month I was messing around with wireguard on my phone and I swear it drained my battery way faster than anyone said. Maybe I had a weird setup or some background apps fighting it but honestly I think some configs just eat power no matter what. Seems like everyone just brushes off the battery drain as minor but for some of us it's not.
 
Are you sure it was wireguard or maybe some app fighting for network or CPU cycles in the background? Try disabling auto-start and see if that helps, sometimes even a small tweak can save a lot of battery
 
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