About this replacement
Hikvision MAS 3300 — 3.8V Li-Polymer Replacement Battery (AHT605056-02)
This is a 3.8V, 5200mAh (19.76Wh) Li-Polymer battery for the Hikvision MAS 3300 conferencing system. It replaces OEM part AHT605056-02 and fits the MAS 3300 unit directly. Voltage, capacity, and connector match the original specification.
- MAS 3300 platform fit: The MAS 3300 runs a 3.8V power rail with a BMS that validates both voltage threshold and pack ID on startup. This replacement meets that voltage requirement and passes the handshake the unit performs before enabling audio and wireless functions.
- Bench tested on actual hardware: We cycled this pack through charge, full discharge, and BMS communication checks. The protection circuit responded correctly to charge termination and low-voltage cutoff without triggering fault states.
- First-session calibration tip: After installing, run one complete charge cycle before the first meeting. The MAS 3300 maps battery state against voltage curves during normal operation, and an uncalibrated pack will show inaccurate charge level warnings for the first session.
Battery indicator showing wrong level after installation
The MAS 3300 estimates battery state using a voltage-threshold model stored in firmware — not a coulomb counter. A new pack has a different internal resistance profile than the depleted cell it replaced, so the unit's percentage readout will be off until it learns the curve. This is not a fault with the battery or the unit. One full charge cycle from flat to 100% resets the firmware's reference points. After that cycle, the indicator tracks accurately.
MAS 3300 not powering on after battery swap
If the unit shows no response after installing the new pack, the BMS is likely in deep-discharge lockout from extended storage. The protection circuit blocks output below approximately 3.0V per cell until a trickle-charge signal is applied. Connect the unit to its charger and leave it for at least 15 minutes before pressing power — most chargers send a low-current wake pulse that clears the lockout. If the unit still does not respond, check that the battery connector is fully seated and the contact pins are not bent.