Modulo de balanceamento novo, valor unitário em packs de 2, ou seja cada pack 5.40€. Tenho 12 packs disponíveis.
Tenho também usados a 2.3€ por unidade.

Balancing Circuit module for LiFePO4 cells - voltage 3.60V.
Controlled resistance balancing module for limiting overcharge LiFePO4 cell (3.2V).

Operating parameters:
Border Balancing voltage: 3.60 V (+ / - 0.05V) [Detection Voltage]
Balance voltage release: 3.50 V (+ / - 0.05V) [Release Voltage]
Maximum voltage: < 5 V [maximal voltage]
Balancing Current: 0 ~ 1.7A
Power consumption: < 20 mikroA
Operating temperature: -40 to +125 °C
Temperature of the resistors to 85 °C
To get more power balancing, they can involved in parallel connection.