1
There is protected (sometimes refered 19670 or PCM) and unprotected (avoid) batteries
2
- Protection prevents over-discharge (kill battery) and over-charge. Most of the
3
chargers will provide overcharge protection. But few devices protect against
4
overdischarge (HC90 doesnt)
5
- Any cells that have panasonic A (3100mah) or panasonic B(3400mah) in make a good choice (protected!)
6
- Reliable brands would be KeepPower, Eagletac, Olight, Efest, AW, Orbtronics, etc
7
- Don't buy any 18650 batteries with "fire" in their name
8
- More devices work with button-top batteries (avoid flat-top)
9
- Protected batteries are slightly larger when unprotected (and difference varies between brands). The
10
device shoulb be capable to hold the protected battery.
13
- ThruNite Universal Ladegerät für 4 Akkus Li-Ionen oder Ni-Mh
14
http://www.amazon.de/ThruNite-Universal-Ladeger%C3%A4t-Akkus-Li-Ionen-Black/dp/B00EYABUO2/ref=sr_1_5?s=ce-de&ie=UTF8&qid=1417375895&sr=1-5&keywords=ladeger%C3%A4t+li-ion+18650
15
- Nitecore D4 Universal Smart Charger (4 Akkus)
18
- Nitecore UM20 USB Charger + 4x Nitecore NL189 batteries (3400 mah)
19
http://www.amazon.de/NiteCore-USB-Ladeger%C3%A4t-LCD-Display-Li-Ion-Zweischachtlader/dp/B00PGD3W38
20
http://www.amazon.de/NiteCore-Akku-3400-Mah-NC-18650/dp/B00DUKCDDY/ref=sr_1_1?s=ce-de&ie=UTF8&qid=1418156357&sr=1-1&keywords=Nitecore+3400
21
- Soshine E4 2 x 18650 LCD Capacity Display Battery Charger with Input & Output Port Power Bank