Nokia 8110 4G BV-6A Replacement Battery 3.7V 1200mAh PDT00-12470 and re-seat it firmly so

and re-seat it firmly so all three contacts engage

replacing the IV-BAT610 in the Inovonics EN1261HT wireless motion detector

The BMS accepted the 6V input without fault codes

This is not a firmware fault — it is the BMS responding to a real dropout

it terminates early — typically between 85–95% — rather than risk overcharging an unknown cell

Nokia 8110 4G BV-6A Replacement Battery 3.7V 1200mAh PDT00-12470 and re-seat it firmly soNokia 8110 4G 2720 Flip 3. 7V Li ion Replacement Battery (BV 6A) This is a 3. 7V, 1200mAh Li ion replacement cell for the Nokia 8110 4G and 2720 Flip. It fits models TA 1048 and TA 1059, along with two additional variants sharing the same BV 6A specification. If your original battery no longer holds a charge or the phone shuts down unexpectedly, this cell replaces it directly. 8110 4G and 2720 Flip compatibility: Both handsets share the BV 6A form