Li-Ion Battery for Yaesu FT-817 FNB-72,85 Plug-Compatible FNB817-L32 Li-Ion Battery Pack provides 11.1V 3240mAh. You can replace FNB-72, 85 without reconstruction. You can use Yaesu NC-72 Battery Charger for full charge. Expand FT-817NDs operating time, and high-power RF output. inside battery use MAXELL Li-ion battery made in japan