TwoNav Aventura 500 Replacement Battery 3.7V 5200mAh

TwoNav Aventura 500 — 3.7V Li-Polymer Replacement Battery (PL605056P)

This 3.7V, 5200mAh Li-Polymer cell replaces the original PL605056P battery in the TwoNav Aventura 500, Aventura, and Aventura Motor handheld GPS navigators. It fits the same footprint at 62 × 55 × 14mm and connects to the same BMS circuit. Capacity figure is from the product specification — 19.24Wh.

• Aventura 500, Aventura, and Aventura Motor compatibility: All three models share the same PL605056P cell format, voltage rail, and connector pinout. The BMS handshake is identical across the range, so one cell covers all three without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Aventura platform. The BMS accepted the cell without fault codes, held the 3.7V nominal rail cleanly, and cutoff triggered correctly at the low-voltage threshold.
• Cold-start satellite acquisition after swap: After fitting this cell, power the unit on outdoors and let it acquire a full satellite fix before starting navigation. A complete power interruption forces a cold start — first fix can take 5–10 minutes in open sky versus under a minute for a warm start once almanac data is cached.

GPS accuracy reduced at low battery on the Aventura 500

As cell voltage drops toward the low-voltage cutoff, some GPS units pull back receiver sensitivity to reduce current draw and extend operating time. On the Aventura platform, this can show as position drift or a weaker satellite signal count on the status screen. The fix is straightforward — a fresh cell at full charge restores the receiver to full sensitivity. If drift persists after a full charge, check that the antenna contact on the battery door is clean and seated flat.

Aventura 500 shutting off without warning at the end of a charge cycle

This happens when the battery indicator is uncalibrated against the new cell — the device hasn't mapped the new cell's discharge curve yet, so the low-battery warning doesn't trigger before the cutoff voltage is reached. The BMS cuts power at approximately 3.0V per cell to protect the Li-Polymer chemistry. Run two or three full charge-to-cutoff cycles and the on-screen indicator will track more accurately against the actual remaining capacity. After the second cycle, the warning should appear at least several minutes before shutdown.