About this replacement
Cattron Theimeg Toggle Controller — 12V Ni-MH Replacement Battery (C8096)
This is a 12V 1500mAh Ni-MH battery for the Cattron Theimeg Toggle Controller, 7700T15, and T01 crane and hoist remote transmitters. It replaces OEM part C8096 directly. If your wireless transmitter has stopped holding a charge or won't power on after months of storage, this is the cell it needs.
- Toggle Controller, 7700T15, and T01 compatibility: These transmitters share the same 12V Ni-MH battery format, connector pinout, and charge management circuit. Swapping between these models doesn't require any modification — the physical pack and cell chemistry are identical across the range.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the bench, confirmed BMS handshake with the controller's onboard charge circuit, and verified solenoid activation pulses didn't cause unexpected voltage dropout under load.
- Monthly charge during idle periods: Crane remotes often sit unused for weeks or months between jobs. Ni-MH cells self-discharge at roughly 1–3% per day. A pack left uncharged through a long idle period can drop low enough that the controller's charge circuit no longer recognises it. Connect the transmitter to its charger for at least 30 minutes once a month during storage.
Solenoid activation causing power dropout on a freshly installed battery
When a crane remote fires a solenoid or relay, the inrush current spike can briefly pull the battery voltage below the BMS protection threshold. On a brand-new cell still at storage voltage — typically 60–70% charge — this margin is thin. The controller reads the spike as an undervoltage fault and cuts output. The fix is straightforward: fully charge the replacement pack before the first use. A full charge brings the cell to around 14.4V open circuit, which gives the BMS enough headroom to absorb the inrush without tripping.
Remote showing "low battery" immediately after fitting a new cell
This is almost always a storage voltage issue, not a faulty battery. Ni-MH cells ship at a partial state of charge to reduce self-discharge during transit and warehousing. The transmitter's fuel gauge reads actual cell voltage, not capacity — and a partially charged Ni-MH pack sitting at 11.8–12.0V will trigger a low-battery warning on most Cattron Theimeg controllers. Connect the transmitter to its charger and run a full charge cycle. Once the pack reaches full charge voltage, the low-battery indication should clear immediately.