About this replacement
Intermec SF61 / SF61b — 3.7V Li-ion Replacement Battery (1016AB01)
This 3.7V, 3400mAh Li-ion battery replaces the OEM pack in the Intermec SF61 and SF61b handheld barcode scanners. It fits the same housing, uses the same connector, and the BMS communicates with the scanner's charge management circuit as expected. Capacity figure is drawn from product data — 12.58Wh total energy.
- SF61 and SF61b compatibility: Both models run the same 3.7V battery rail and share an identical battery bay and connector pinout. The BMS handshake is the same across both, so one pack covers the full SF61 platform without modification.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on the SF61 platform and monitored BMS communication at each stage. The protection circuit responded correctly to charge termination and low-voltage cutoff — no false trips recorded.
- First shift prep for pick-and-pack environments: After installing the new pack, seat the scanner in its cradle for a full charge cycle before triggering. The scan trigger draws an inrush current spike — if the cell is near minimum on the first shift, that spike can trip the BMS prematurely. A full pre-charge prevents that.
Cradle showing a charging error on a fresh pack
Charging docks on the SF61 platform read battery state through the contact pins on the battery face. If those contacts have oxidation or debris from storage, the dock interprets high contact resistance as a fault and throws an error rather than starting a charge cycle. Wipe the gold contacts on both the battery and the dock with a dry cloth, then reseat firmly. If the error clears within 30 seconds of reseating, contact resistance was the cause — not a faulty pack.
Scanner losing wireless connection during rapid scan bursts
During a fast scan burst, the SF61 pulls current simultaneously for the imager and the wireless radio. That combined draw can cause a brief voltage sag on a partially charged cell, and the radio drops its link before the scanner can reconnect. This is most common when the battery is below 30% charge. Keeping the pack above that threshold during high-frequency scanning eliminates most wireless dropout events — if dropout persists above 30%, check that the radio channel is not congested at the access point.