TDK Life On Record A34 Replacement Battery 7.2V 2000mAh

TDK Life On Record A34 / A34 Trek Max — 7.2V Ni-MH Replacement Battery (EU-BT00003000-B)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the TDK Life On Record A34 and A34 Trek Max portable Bluetooth speakers. It replaces OEM part EU-BT00003000-B and restores the speaker's wireless audio and Bluetooth functionality. Capacity matches the original pack at 14.4Wh.

• A34 and A34 Trek Max compatibility: Both models share the same battery bay dimensions, 7.2V nominal rail, and connector pinout. The BMS on each unit reads the same charge termination signal, so this cell drops straight in without re-pairing or firmware changes.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on A34 hardware. The BMS accepted the cell without throwing a fault, delta-V termination triggered cleanly at full charge, and the protection circuit cut off correctly at low-voltage threshold.
• Ni-MH discharge routine for A34 use: Ni-MH cells in portable speakers suffer memory effect when repeatedly charged from a high state of charge. Run the A34 down to the low-battery indicator at least once every four to six weeks before recharging — this keeps cell capacity honest across the pack's service life.

Why the A34 audio cuts out before the battery indicator reaches empty

The A34's amplifier pulls a sharp current spike when bass hits at higher volume levels. On a degraded or memory-affected Ni-MH pack, internal resistance rises enough that this spike causes a momentary voltage sag. The speaker's protection circuit reads that sag as a low-battery condition and cuts audio before the fuel gauge shows empty. Replacing the pack eliminates the high-resistance cause — the new cell handles transient amp draw without sagging past the cutoff threshold.

Bluetooth dropping at high volume on a new battery

At loud playback, the amplifier and Bluetooth radio draw current simultaneously, and the combined load can cause a brief voltage dip on the battery rail. If Bluetooth drops specifically at high volume but reconnects immediately after, the radio module is losing its minimum operating voltage during the peak draw. Check that the replacement cell is fully charged — a Ni-MH pack at partial state of charge has less headroom to absorb the combined amp-plus-radio spike. Charge to full, then test again at the same volume level before assuming a fault.