Hetronic TGA Crane Remote Replacement Battery 6V 700mAh

Hetronic TGA / TGB — 6V Ni-MH Replacement Battery (253211)

This is a 6V 700mAh Ni-MH replacement battery for Hetronic TGA and TGB wireless crane remote control systems. It carries OEM part number 253211 and matches the original cell format at 55.84 x 52.12 x 14.09mm. Swap it into any TGA or TGB remote that uses the 253211 form factor.

• TGA and TGB compatibility: Both remotes share the same 6V supply rail, connector footprint, and charge management circuit, which is why a single cell format — 253211 — covers both units without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a TGA remote. The BMS accepted the Ni-MH pack immediately on insertion, and the charge circuit completed without fault flags or cutoff interruptions.
• Monthly charge during crane downtime: If the crane remote sits unused for weeks — common during seasonal shutdowns or equipment rotation — charge the battery once a month. Ni-MH cells that sit discharged too long lose capacity through self-discharge and may not recover full voltage even after a full charge cycle.

Solenoid activation causing power dropout on a freshly installed battery

When a TGA or TGB remote triggers a crane solenoid or relay, the inrush current spikes briefly above the steady-state draw. If the replacement cell's internal resistance is elevated — common when a Ni-MH pack ships at storage charge — the voltage can dip enough to trip the remote's undervoltage cutoff. The unit goes dark mid-command, which looks like a dead battery even though the cell isn't discharged. The fix is straightforward: charge the battery fully before the first use, so internal resistance drops to its normal operating level and the cell can absorb the solenoid inrush without a voltage sag below the cutoff threshold — typically around 5.0V for a 6V Ni-MH pack.

Remote showing low-battery indicator immediately after cell swap

A freshly installed 253211 cell often reads as low battery right after insertion. This happens because Ni-MH packs ship at storage voltage — roughly 5.4–5.6V — not full charge voltage of around 7.2V peak open-circuit. The remote's fuel gauge reads the resting voltage and flags it as depleted. Put the remote on the Hetronic charger for a full cycle before drawing any conclusions about the replacement cell. Once the pack reaches full charge, the low-battery indicator should clear and the remote will operate normally.