BP-216 is a battery holder that takes 2 × AA batteries and has a voltage step up converter built in. NOTE:TX Power of the radio is reduced using the BP-216. There are some "AA" sized Li-ion batteries available that, at 3.7 volts each, supposedly give full output when fitted in the BP-216, though you need a special charger for these batteries. I have not tried this, it was reported on Mods.dk.
Best advice I can give is shop around. Some emporia offer 1400 - 1600 mAh for less than the branded 1300 mAh.
Equivalents:
BP-216, BP-217, BP-217Li,
Image not to scale. | Common Name. | Dimensions. Height × Width × Depth. | Chemical Composition. | Nominal Voltage. |
---|---|---|---|---|
BP-217. | 48 mm × 58 mm × 22 mm approx, Contacts: Battery can only be fitted one way. | Li-ion, Or whatever you put in the holder. | 7.4 volts. |