I got Mullvad VPN to try it for a month after years using ExpressVPN, but it drains my battery (iPhone SE, 2nd generation, 2020) into oblivion in a matter of 3-4 hours.
Browsed the Cursed Site™️ and using WireGuard instead of the Mullvad VPN app seems to be the most common solution – but not for me. WireGuard either it doesn’t connect to any location or disconnects after 2-3 minutes.
Anyone got any advice?
EDIT: added more details about the phone model.
Thanks for your answer!
It is true it seems to vary greatly. ExpressVPN went very easy on my phone battery and was on 24/7. I guess I got unlucky with Mullvad VPN.
I just want to get an EU alternative, which is what prompted the change, and Mullvad seems pretty trustworthy and safe.
You also might try changing VPN protocols. OpenVPN and Wireguard are the 2 most popular, and there’s also L2TP on certain providers. For me OpenVPN drains faster than Wireguard. And if I remember correctly, using L2TP on Mozilla vpn drained like 0 battery when I tried it, although L2TP is developed by Microsoft so take that into consideration