Topic hub
EDC Batteries
The cells and chargers that keep a loadout running: 18650 vs 21700, primaries vs rechargeables, protection circuits, and safe charging.
Where to start
Head-to-heads
Comparisons
Key terms
Glossary terms
- 18650
- A common 18×65mm rechargeable lithium cell.
- 21700
- A larger 21×70mm cell — more runtime, more girth.
- CR123A
- A compact 3V lithium cell; rechargeable twin is 16340.
- mAh
- Milliamp-hours — a cell’s charge capacity.
- Protected Cell
- A battery with a built-in safety circuit.
Reader favorites
The short list — full rankings live on the best-gear page.
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