01
Start near 300Wh for light overnight kits
Lights, phones, cameras, and a laptop can fit a compact battery when you are not using electric heat.
- Easy to carry
- Usually 600W-class output
- Limited overnight heating runtime
02
Look near 800Wh for overnight heat
An 80W heated blanket for eight hours needs roughly 753Wh after a simple 85% AC efficiency assumption.
03
Choose 1,800W or more for cooking appliances
Kettles and microwaves draw high power even when used briefly. Compare the appliance input label with continuous rated output.
