About this replacement
Honeywell Captuvo SL22 / SL42 Sled — 3.7V Li-ion Replacement Battery (BAT-MOB00)
This 3.7V, 1250mAh Li-ion cell replaces the BAT-MOB00 pack in the Honeywell Captuvo SL22 and SL42 sled series. The Captuvo sled clips around an iPhone, turning it into a barcode scanner for retail and enterprise pick-and-pack workflows. Voltage and capacity match the original spec exactly — no firmware prompts or capacity warnings during normal dock charging.
- SL22 and SL42 sled compatibility: Both sleds share the same battery bay geometry, connector pinout, and BMS handshake protocol, which is why a single cell covers the full range. The dock authenticates over the same data line regardless of which sled model you're running.
- Bench tested on actual hardware: We cycled this pack through the SL22 dock and monitored BMS communication during scan-trigger inrush events. The cell held voltage above the scanner's minimum imaging threshold throughout burst scanning sequences without triggering a low-voltage cutoff.
- First-shift preparation for Captuvo sleds: Before the first shift, seat the sled in its charging cradle and let it complete a full charge cycle. The scan trigger and active wireless radio together draw the highest combined current when the cell sits near minimum — a fully charged cell prevents a false BMS trip the moment a picker starts rapid scanning at shift start.
Cradle showing a charging error after fitting a new BAT-MOB00 pack
The Captuvo dock reads battery state through spring-loaded contact pins on the underside of the sled. Oxidation or debris on those pins raises contact resistance enough to cause a handshake failure, which the dock reports as a charging error rather than a connection fault. This is not a cell defect — the error code appears even with a fully functional new pack if the contacts aren't clean. Wipe the battery contacts and the dock pins with a dry lint-free cloth, reseat the sled firmly, and the charging indicator should clear within 30 seconds.
Scanner imager going dark mid-shift despite showing battery indicator bars
The Captuvo's imager and illumination LEDs draw a short, sharp current spike each time the trigger fires. A degraded or deeply discharged cell can't sustain that spike, so the BMS cuts power to protect the cell — the screen may still show charge bars because the phone's own battery is separate from the sled pack. The fix is to distinguish which battery is low: check the Captuvo sled battery level in the scanner application, not the iPhone status bar. Dock the sled until the sled battery reads above 3.6V before returning it to the floor.