What's the best charger that ticks these boxes?
I'm not too fussed by speed, safety is better.
- Charges AAA/10440, AA, RCR123, 10180
- Smart charging (cut off when fully charged)
- 2-4 bay
When you state "AAA/10440 and AA," do you mean NiMH AAAs and AAs, or just li-ion cells in those form factors ie: 10440 (AAA size) and 14500 (AA size?)
For the smaller 10440s and 10180s you're going to want a charger that charges at a low rate of say 200mA, or 250mA.
If you're just talking about li-ions and not NiMH batteries, you might be able to get by with something like an Xtar VP2, which has three charging rates of 250mA, 500mA and 1A.
The 250mA rate is good for 16340s and 10440s, although it's probably a tad high for the 10180s, but should be safe enough, albeit possibly at the expense of cycle life for the smallest of those listed cells.
Chris