SportDog TEK 2.0 GPS Handheld Replacement Battery 3.7V 6400mAh

SportDog TEK 2.0 GPS Handheld — 3.7V Li-ion Replacement Battery (650-970)

This 3.7V 6400mAh lithium-ion battery replaces part number 650-970 (also listed as V2HBATT) in the SportDog TEK 2.0 GPS handheld unit. The TEK 2.0 handheld is the receiver device you carry in the field to track your dogs' real-time GPS locations. When the original cell degrades and the unit shuts down mid-hunt, this is the direct replacement.

• TEK 2.0 handheld compatibility: The TEK 2.0 handheld runs a single-cell 3.7V Li-ion configuration with a BMS that monitors cell voltage and temperature. This battery matches the original cell dimensions (71.00 × 37.00 × 18.60mm), connector pinout, and voltage curve the onboard BMS expects. A mismatch in any of those parameters causes the unit to reject the cell or fail to report accurate charge level.
• Bench tested on actual hardware: We cycled this battery through full charge and discharge on the TEK 2.0 platform. The BMS accepted the cell without error flags, charge termination triggered correctly at full voltage, and the unit powered up and held a GPS lock through the test session.
• First power-up after installation: Take the handheld outside immediately after fitting the new battery. GPS trackers perform a cold start after any power interruption — the TEK 2.0 needs 5 to 10 minutes outdoors with a clear sky view to reacquire satellite lock. Subsequent power cycles warm-start in under a minute.

Why the TEK 2.0 battery drains faster in remote hunting areas

In areas with poor cellular coverage, the TEK 2.0 handheld increases transmission power and poll frequency as it tries to maintain a data link to the collar. GPS chipsets also draw more current when satellite geometry is poor — more satellites need to be tracked simultaneously to get a usable fix. Both systems pulling harder at the same time accelerates cell drain noticeably compared to use in open, well-covered terrain. If you're hunting in remote country regularly, carry the unit in active tracking mode only when you need it and drop to standby between checks.

TEK 2.0 handheld not showing dog location after battery swap

This is a cold-start GPS acquisition issue, not a battery or hardware fault. After any power interruption, the GPS module loses its cached almanac data and has to rebuild satellite position data from scratch. The TEK 2.0 handheld needs a clear sky view — not under tree canopy or inside a vehicle — for 5 to 10 minutes before the first location fix populates. If the unit still shows no location after 10 minutes outdoors, check that the collar is powered on and within range, then verify the handheld firmware hasn't reset pairing settings by navigating to the device list under the Settings menu.