About this replacement
JAY Beta6 Two-way Radio — 3.7V Li-ion Replacement Battery (F1305896)
This 3.7V 1800mAh Li-ion battery replaces OEM part F1305896 in JAY crane remote control units. It fits the Beta6 Two-way Radio and several JAY remote platforms used in industrial lifting operations. Voltage and capacity match the original cell specification exactly.
- Beta6, Gama6, Gama10, Moka2 platform compatibility: These JAY remotes share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol — which is why one cell covers the full range. The F1305896 part number is the common denominator across the lineup.
- Bench tested on actual hardware: We cycled this cell through transmission bursts and solenoid activation sequences on JAY remote hardware. The BMS held stable across inrush events and did not trip on relay engagement at rated capacity.
- Idle-period charge maintenance: For crane remotes sitting unused between jobs, charge the battery once a month. Li-ion cells discharged below 2.5V enter deep-discharge BMS lockout — the BMS will stop accepting charge current and the remote will not power on even with a charger connected.
Solenoid activation causing power dropout on a freshly installed battery
When a solenoid or relay fires, it draws a short inrush current spike that can briefly pull cell voltage below the BMS low-voltage cutoff threshold. On a cell that shipped at storage voltage (typically 3.6–3.8V), this spike is enough to trigger an immediate shutdown. The BMS interprets the sag as a fault condition rather than a load event. Charge the battery fully to 4.2V before the first use — this gives the BMS the headroom it needs to absorb the inrush without tripping.
Remote shows low battery indicator immediately after new cell install
Cells leave the warehouse at storage voltage — usually around 3.6V — not at full charge. The JAY remote reads this as a low-battery state because it is. This is not a fault with the cell. Connect the battery to the original JAY charger and bring it to 4.2V before pairing with the crane system. Once fully charged, the low-battery indicator will clear and the remote will operate normally.