About this replacement
Asus R600 — 3.7V Li-ion Replacement Battery (SBP-13)
This is a 3.7V, 2200mAh Li-ion replacement cell for the Asus R600 portable GPS navigator. It fits directly into the R600 housing and restores power to the navigation unit when the original cell has degraded. Capacity matches the factory spec at 2200mAh (8.14Wh).
- R600 platform fit: The R600 uses a single-cell 3.7V Li-ion pack with a low-current BMS tuned for the GPS receiver and display load — no high-draw motor or burst current to manage. The SBP-13 cell meets that voltage rail and connector spec without modification.
- Bench tested on actual hardware: We ran the cell through charge and discharge cycles on the R600 platform. The BMS engaged protection cutoff correctly at both ends of the voltage range, and the unit powered on and held charge through full navigation sessions without unexpected shutoff.
- First-fix delay after fitting: After fitting this cell, power the R600 on outdoors and let it acquire a satellite fix before driving. Full power removal triggers a cold start — the GPS receiver rebuilds its almanac data from scratch, which takes 5–10 minutes for the first lock versus under a minute on subsequent warm starts.
GPS accuracy reduced at low battery on the R600
As cell voltage drops toward the lower protection threshold, some GPS units — including the R600 — reduce RF receiver sensitivity to stay within power budget. This shows up as a weaker satellite signal bar count and occasional position jumps, even when the unit is still on. The fix is straightforward: keeping the cell above roughly 3.5V maintains full receiver sensitivity. Charge the unit before extended navigation rather than running it down to shutoff.
R600 shutting off without low-battery warning
After a battery swap, the R600's fuel gauge is uncalibrated — it has no history of the new cell's charge curve. The unit's voltage-threshold indicator can read the remaining charge as higher than it actually is, then hit the hardware cutoff voltage with no visual warning. This is not a fault with the cell. Run the R600 through one full charge-to-discharge cycle on the new battery so the onboard gauge can recalibrate against the actual cell voltage. After that first cycle, low-battery warnings will appear at the correct threshold again.