Six of these so far all work fine 3-4 hours of sun a day seems more than enough to keep the battery at the level I need for a lot active cameras.
Efficient Charging With LST 7 Stages 5A Battery Charger - 3.3A 12V For Ultimate Performance
35 Review
70mai Jump Starter Max Midrive PS06 black
37 Review
Mroinge Automatic 6V/12V Trickle Charger For Vehicles, Motorcycles, Boats And More - Maintain Your Batteries With Ease!
29 Review
Xiaomi 70mai Jump Starter Midrive PS01
120 Review