TechniSat TechniTouch 91504401 Replacement Battery 10.8V

TechniSat TechniTouch TV-SAT-Kombi-Analyser — 10.8V Ni-MH Replacement Battery (91504401)

This 10.8V 4500mAh (48.6Wh) Ni-MH battery replaces the original pack in the TechniSat TechniTouch TV-SAT-Kombi-Analyser. The TechniTouch is a portable satellite and terrestrial signal analyser used by broadcast technicians on-site, where mains power is unavailable. Voltage, capacity, and connector match the original 91504401 specification.

• TechniTouch TV-SAT-Kombi-Analyser fit: The TechniTouch runs its measurement front-end, display backlight, and RF tuner modules from a single 10.8V rail. This pack meets that voltage requirement and carries enough capacity to sustain the combined draw across extended field sessions without a voltage sag that would corrupt a measurement log.
• Bench tested on actual hardware: We cycled this pack under a load profile matching the TechniTouch's active-measurement draw. The BMS held voltage within spec across the discharge curve, and protection circuitry tripped cleanly at the low-voltage threshold without triggering a hard fault in the instrument firmware.
• Post-install calibration cycle: After fitting this pack, run a full calibration sequence through the TechniTouch instrument menu before taking it into the field. The analyser maps battery state during that routine — skipping it causes the low-battery indicator to trigger prematurely during the first measurement session, even on a fully charged pack.

BMS lockout after the TechniTouch sat unused in a carry case for months

Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. A pack left in a case for several months can drop below the BMS recovery threshold — typically around 9V for a 10.8V Ni-MH pack — at which point the protection circuit goes into sleep mode and the charger sees no response. Connecting the pack to the TechniSat charger alone will not wake it from this state. Apply a slow trickle charge at 0.1C for 30–60 minutes using a Ni-MH recovery charger capable of bypassing the sleep-mode lockout, then transfer to the standard charger once cell voltage climbs above 10V.

TechniTouch readings drifting or resetting mid-logging session

This is not a firmware glitch — it is a voltage dropout event. During a sustained logging session, the RF tuner and signal processing modules maintain a steady combined draw, and if cell capacity has degraded, voltage sags under that load before the battery indicator shows critical. The instrument interprets the momentary undervoltage as a power fault and resets the active session to protect data integrity. Check resting voltage after a full charge — a healthy 10.8V Ni-MH pack should read between 12.5V and 13.0V at rest. If resting voltage falls below 11.5V after a full charge cycle, the pack has degraded and should be replaced.