Smartcom SC-280 Compatible Battery 7.4V 2050mAh Li-ion
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Smartcom SC-280 Compatible Battery 7.4V 2050mAh Li-ion - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Smartcom SC-280 Compatible Battery 7.4V 2050mAh Li-ion - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
2050mAh
Smartcom SC-280 / SC-380 — 7.4V Li-ion Replacement Battery
This 7.4V 2050mAh Li-ion battery replaces the original pack in the Smartcom SC-280 and SC-380 portable two-way radios. Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol, so one pack covers both units. Capacity is 2050mAh (15.17Wh) — use that figure for any power budget calculations, not web sources.
- SC-280 and SC-380 shared platform: Both radios run the same 7.4V voltage rail, use an identical multi-pin battery connector, and expect the same BMS communication cycle at power-on. The shared footprint — 113.60 × 55.10 × 17.90mm — means one SKU fits either unit without modification.
- Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on the SC-280 dock and confirmed the BMS handshake completes correctly. The protection circuit tripped cleanly at the expected overcurrent threshold when we simulated a PTT transmit spike, then reset without requiring manual intervention.
- First insertion into the dock: If the charger shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The SC-280 dock requires a clean contact cycle to accept the new BMS handshake before charging will begin.
Why the SC-280 cuts out mid-transmission on a freshly inserted battery
New Li-ion cells ship at storage voltage — typically around 3.6–3.7V per cell, giving roughly 7.2–7.4V at the pack level. When you press PTT, transmit current spikes sharply and the BMS may interpret that draw as an overcurrent event if cell voltage is already sitting at the low end of the acceptance window. The radio drops out of TX mode as the protection circuit opens. Charge the pack fully before first transmit use — the BMS trip threshold sits comfortably above the overcurrent point once cells are at 4.1–4.2V per cell.
Bar indicator showing one fewer bar than expected after fitting this pack
The SC-280 uses a simple voltage-threshold bar display — each bar corresponds to a fixed voltage band, not a fuel gauge calculation. A new pack at storage voltage will read one bar lower than a fully charged pack even if the cell health is perfect. This is not a fault with the battery. Dock the radio for a full charge cycle and the indicator will step up to the correct bar count once cell voltage crosses the next threshold, typically above 7.8V at the pack terminals.
Compatible Models
Technical Specifications
Product Highlights
- Brand: Smartcom
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The SC-280 dock LED went solid red and never changed after I put in the new battery — what's happening?
A solid red fault LED usually means the dock measured pack voltage below its acceptance threshold on first insertion, so charging never started. Remove the battery, wipe the gold contact strip on the pack with a dry cloth, and reseat it firmly — a dirty contact prevents the BMS handshake from completing. If the LED stays red after reseating, the pack likely arrived at deep storage voltage; leave it in the dock for 15–20 minutes and the dock's recovery circuit should raise cell voltage above the acceptance floor and switch to normal charge.
My SC-280 drops to noticeably weaker audio and signal output partway through a long shift — is that the battery or the radio?
That symptom points to voltage sag under sustained RF output load. As cell voltage drops toward the lower end of the discharge curve, the radio's PA stage receives less voltage and reduces TX power to stay within its operating envelope — audio and signal strength both drop as a result. It is not a radio fault. The fix is to avoid running the pack to full depletion on heavy-use shifts; swap or recharge once the bar indicator drops to one bar, which corresponds to approximately 7.0V at the pack terminals.
This battery was stored in a drawer for a few months before I used it and now the radio won't power on at all — is the pack dead?
Li-ion cells self-discharge slowly during storage, and if the pack sat long enough to drop below the BMS recovery threshold — typically around 6.0V for a 7.4V two-cell pack — the protection circuit locks out and the radio sees no voltage. Place the pack in the SC-280 dock and leave it for at least 30 minutes; most docks apply a low-current recovery charge before switching to full rate. If the dock accepts the pack and the LED moves from red to amber or green within that window, the BMS has re-initialised and the pack will charge normally.
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