Sokkia SHC-236 Replacement Battery 3.7V 5200mAh 60991

Sokkia SHC-236 / SHC-336 — 3.7V Li-ion Replacement Battery (60991)

This is a 3.7V 5200mAh Li-ion battery built to the OEM part number 60991 specification. It fits the Sokkia SHC-236 and SHC-336 handheld data collectors used in field surveying, logistics, and warehouse scanning. The battery slots into the same bay as the original and connects via the same contact plate.

• SHC-236 and SHC-336 shared platform: Both models run on the same 3.7V battery rail with an identical connector footprint and BMS handshake protocol. One pack covers both units — no firmware difference affects charge acceptance between the two.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the SHC platform and confirmed the BMS negotiated correctly at both low-state and full-charge thresholds. No false cutoff events were recorded during sustained scan-plus-wireless draw.
• First-shift preparation for pick-and-pack: After installing this pack, seat the scanner in its cradle and run a full charge cycle before the first shift. The scan trigger inrush current is highest when the cell is near minimum charge — a fully charged cell prevents false BMS trips during the first burst of heavy scanning activity.

Cradle showing a charging error after fitting a new pack

SHC cradles use a contact-resistance check at the start of every charge session. If the dock reads resistance above threshold — usually caused by debris or oxidation on the battery contact pads — it flags a charging error instead of starting the cycle. This is not a cell fault. Wipe the gold contacts on the battery and the cradle dock with a dry lint-free cloth, then reseat the scanner firmly until it clicks. The cradle should begin charging within 10 seconds of a clean reseat.

Scanner losing wireless connection during rapid scan bursts

During a rapid scan sequence, the SHC-236 draws current from both the imager and the wireless radio simultaneously. On a degraded or deeply discharged cell, this combined inrush pulls the cell voltage below the BMS minimum threshold momentarily, causing the radio stack to drop its connection. The fix is to ensure the battery is above 50% charge before high-frequency scanning sessions. If drop-outs persist on a charged pack, check that the battery contact plate is seated flush — any tilt increases contact resistance and worsens voltage sag under load.