About this replacement
Intermec SR61T / SR61 Series — 3.7V Li-ion Replacement Battery (AB3)
This 3.7V, 3400mAh Li-ion cell replaces the AB3 battery in the Intermec SR61T and SR61 handheld barcode scanners. It also fits the IP30 and IP30A sled. Sourced to match the original cell format and BMS handshake the SR61 dock expects.
- SR61T, SR61, IP30, and IP30A compatibility: These models share the same 3.7V battery bay, connector pinout, and BMS communication protocol. One cell works across all of them without adapter or firmware adjustment.
- Bench tested on actual hardware: We cycled this pack through the SR61T's scan-trigger inrush and Bluetooth polling load simultaneously. The BMS held the output rail steady and did not trip on rapid multi-scan bursts typical of warehouse pick-and-pack workflows.
- First-shift preparation: After installing, seat the scanner in its charging cradle and run a full charge cycle before using it on the floor. Scan-trigger inrush current spikes highest when the cell is near its minimum — a fully charged pack prevents false BMS cutoffs at the start of a shift.
Cradle showing a charging error on a new pack
The SR61 charging cradle reads the pack's ID pin before it starts a charge cycle. If the dock contacts on the battery or cradle have oxidation or debris, the handshake fails and the cradle throws a charge error — even with a new cell. Wipe the gold contacts on the pack and the cradle bay with a dry cloth, reseat the scanner firmly, and check that the charge LED changes state within 10 seconds. If the error persists, check dock contact spring tension — a worn spring drops contact voltage below the 2.8V threshold the ID circuit needs.
Scanner dropping wireless connection during a rapid scan burst
When the SR61T fires its scan trigger and transmits over Bluetooth in the same instant, the combined inrush current can pull the cell voltage down sharply on a degraded or deeply discharged pack. The radio stack drops its connection when supply voltage sags below roughly 3.2V. A fresh, fully charged cell maintains output above 3.5V under this dual load. If drop-outs continue after a full charge, check the cradle contact resistance — a high-resistance dock connection limits charge acceptance and the pack never reaches full capacity.