About this replacement
Garmin Nuvi 1300 / 1350 / 1370 Series — 3.7V Li-Polymer Replacement Battery (361-00019-16)
This 3.7V 1250mAh Li-Polymer cell replaces the original battery in the Garmin Nuvi 1300, 1350, 1350T, and 1370 portable GPS navigators. It matches OEM part numbers 361-00019-16 and 361-00019-12. Fit the new cell when the existing battery no longer holds a charge or causes unexpected shutdowns during navigation.
- Nuvi 1300 series battery platform: The 1300, 1350, 1350T, and 1370 share the same battery bay dimensions, connector pinout, and 3.7V supply rail. One cell covers all these variants without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge runs on Nuvi 1300 hardware. The BMS held charge termination cleanly at 4.2V and cut off at the low-voltage threshold without tripping early or allowing overdischarge.
- First-fix satellite tip: After fitting this cell, power the unit on outdoors in open sky and leave it stationary. The GPS performs a cold start after any full power interruption — expect 5–10 minutes to acquire a first satellite fix. Subsequent warm starts drop to under a minute once almanac data is cached.
GPS accuracy dropping as battery charge falls
The Nuvi 1300 reduces power to the GPS receiver module when battery voltage sags toward the low threshold. At reduced receiver sensitivity, the unit struggles to maintain lock on weaker satellite signals — particularly in urban canyons or under tree cover. Position drift and longer re-acquisition times are the first signs. Keeping the battery charged above 20% avoids this power-saving cutback and maintains full receiver sensitivity.
Nuvi shutting off without low-battery warning
The battery indicator on the Nuvi 1300 reads state-of-charge from a voltage curve. After a battery swap, the firmware's internal charge model is uncalibrated against the new cell. The unit can display two or three bars right up until voltage drops sharply at the knee of the discharge curve, triggering a hard cutoff with no warning. Run one full charge-to-cutoff cycle on the new battery — the firmware recalibrates its voltage mapping and warning thresholds align correctly from the second cycle onward.