JAY 6AAA800 Crane Remote Replacement Battery 7.2V 700mAh

JAY UTE050 Series — 7.2V Ni-MH Replacement Battery (6AAA800)

This is a 7.2V, 700mAh Ni-MH replacement for the JAY 6AAA800 battery pack. It fits the UTE050 wireless crane remote transmitter used in overhead crane and industrial hoist operations. Voltage and cell count match the original pack exactly.

• UTE050 transmitter fit: The UTE050 remote uses a 7.2V six-cell Ni-MH configuration tied to a specific connector and contact orientation. This replacement matches that layout so the pack seats and makes contact without modification.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge on the bench, confirmed the cell voltage balance across all six cells, and verified the BMS did not flag a fault during solenoid activation loads typical of crane relay switching.
• Storage charge for infrequent crane use: If the remote sits unused for more than three weeks, put the battery on charge for a full cycle before returning it to service. Ni-MH cells lose charge during idle storage, and a partially discharged pack in a remote that sits in a charging cradle but never fully cycles will fade faster than one that is actively maintained.

Solenoid activation causing power dropout on the UTE050

When a crane remote fires a solenoid or relay, the current draw spikes sharply for a fraction of a second. An aged or partially charged Ni-MH pack may sag below the transmitter's minimum operating voltage during that inrush spike. The remote then cuts out mid-command, which can appear as a radio dropout or a frozen display. A fully charged pack at 8.4V open-circuit handles that inrush without sagging into shutdown — charge to full before any shift where relay activation is continuous.

UTE050 remote showing low-battery warning immediately after fitting a new pack

A new Ni-MH pack ships at storage voltage, typically around 6.8–7.0V rather than the full 8.4V charge state. The UTE050 reads that voltage on first boot and flags it as low. This is not a faulty battery — it is a cell that has not yet been charged. Place the pack in the charger for a complete cycle before fitting it into the remote. After a full charge, the low-battery indicator should clear on startup.