About this replacement
Asus MyPal A686 / A696 / A626 — 3.7V Li-ion Replacement Battery (SBP-09)
This is a 3.7V, 1300mAh Li-ion cell for the Asus MyPal A686, A696, and A626 pocket PCs. It slots into the battery bay using the original SBP-09 footprint and connector. If your MyPal shuts down mid-task or won't hold a charge, this is the direct swap.
- A686 / A696 / A626 platform fit: All three MyPal models run the same 3.7V battery rail, share the SBP-09 form factor, and use the same connector pinout — one cell covers the whole family without any mechanical modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on MyPal hardware. The BMS accepted the charge handshake without error flags and held voltage within spec across the full discharge curve.
- RAM data protection before swap: Sync all open data to your host PC before pulling the battery. The MyPal stores active application state and unsaved files in volatile SRAM — that memory is powered entirely by the main cell. Full power removal clears it instantly.
Why the MyPal A686 loses contacts and calendar entries after a battery change
The A686 uses SRAM for working memory — not flash. SRAM requires continuous power to retain data, and the main Li-ion cell is the only source. The moment that cell is removed, any data not yet synced to a host PC or storage card is gone. This catches users off guard because the behaviour looks like a firmware fault, not a power fault. Before you remove the old battery, run ActiveSync or Windows Mobile Device Center and confirm a full sync has completed.
MyPal shows a charging indicator but won't boot after a new battery is fitted
A deeply depleted Li-ion cell can sit below the minimum boot voltage even after a short charge — the device draws power but the CPU never gets enough to start the boot sequence. This is not a faulty battery. Leave the unit on charge for at least 60 minutes before pressing the power button. If the charge LED is solid and the unit still won't boot, perform a hard reset by holding the reset pin for 10 seconds, then attempt boot with the charger still connected.