Teltonika GH3000 Replacement Battery 3.7V 1000mAh Li-ion

Teltonika GH3000 / GH4000 / MH2000 — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1000mAh Li-ion cell for the Teltonika GH3000, GH4000, and MH2000 handheld terminals. These are rugged mobile devices used in logistics, warehouse operations, and field asset tracking. Dimensions are 53.00 × 33.90 × 5.70mm — confirm against your original cell before fitting.

• GH3000, GH4000, MH2000 cell compatibility: All three models run the same 3.7V single-cell architecture with a shared connector footprint and BMS handshake protocol. Swapping between these variants does not require firmware changes or hardware modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a GH3000 unit. The BMS accepted the cell without flagging a fault, charge termination fired correctly at 4.2V, and low-voltage cutoff triggered as expected before cell damage threshold.
• Fuel gauge recalibration on first use: After installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This allows the fuel gauge IC to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — preventing erratic percentage readings from the first day.

Sudden shutdown at 20–30% on the Teltonika GH3000 after a cell swap

This is a voltage cliff problem, not a capacity problem. A new cell that hasn't been calibrated causes the fuel gauge IC to misread the remaining charge — the reported percentage doesn't match the actual cell voltage. When the GH3000 fires up the barcode scanner or cellular radio under load, the cell voltage drops sharply below the device's shutdown threshold before the gauge catches up. Run one full discharge cycle down to automatic shutdown, then charge uninterrupted to 100%. After that cycle, the coulomb counter has real reference points and the shutdowns stop.

GH3000 not powering on after sitting in storage

Li-ion cells self-discharge in storage, and if the GH3000 sat unused for several months the cell voltage may have dropped below 2.5V. At that point the BMS enters lockout mode to prevent unsafe charging of a deeply discharged cell — the device appears completely dead. Connect the unit to a charger and leave it for 15–20 minutes without pressing the power button; the charge IC trickle-charges the cell back above the BMS re-enable threshold, typically around 2.9–3.0V. Once that threshold is crossed, the BMS releases and normal charging resumes. If the device still won't respond after 30 minutes on charge, measure cell voltage directly — anything below 2.5V after trickle attempt indicates the cell needs replacement.