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1ICP/5/30/48 1S1P Compatible Battery 3.7V 750mAh Li-ion

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Replaces OEM part number 1ICP/5/30/48 1S1P for compact single-cell portable devices requiring 3.7V power restoration.
This 3.7V 750mAh lithium-ion cell delivers 2.78Wh total energy to lightweight portable electronics with integrated fuel gauges.
Connector type and orientation match the original pack housing; physical dimensions are 49.38 x 32.40 x 5.40 mm.
We bench-tested this cell on a calibrated load bank — BMS accepted the pack immediately with clean voltage regulation across discharge.
After installing, run one full charge-discharge cycle before trusting the capacity indicator; fuel gauge firmware requires calibration against new cells.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

🔹 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: 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.

Voltage

3.7V

Amp

750mAh

Custom Battery Pack 1ICP/5/30/48 1S1P — 3.7V Li-ion Replacement Battery

This is a 3.7V 750mAh (2.78Wh) Li-ion single-cell replacement battery pack. It carries OEM part number 1ICP/5/30/48 1S1P and fits compact portable electronics that run on proprietary 1S1P cell configurations. If the original pack has degraded or failed, this unit restores the device to working condition.

  • 1S1P single-cell configuration: One cell, no parallel arrangement — this topology is common in lightweight portable devices where board space and weight are tight. The 3.7V nominal rail matches the charge IC input range on these platforms directly, with no step-down conversion required.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on the bench. The integrated BMS held the cell within safe voltage limits, engaging protection cutoff correctly at both ends of the charge curve without false trips.
  • First-cycle calibration: If your device uses a fuel gauge IC, run one full charge-to-discharge cycle after installing this pack. The gauge chip recalibrates its capacity model against the new cells — without this step, the capacity indicator may read inaccurately for the first several uses.

Pack running at lower voltage than rated on first power-on

Replacement Li-ion packs ship at storage voltage — typically 3.6V to 3.85V rather than the 4.2V full-charge ceiling. This is intentional. Storing cells at full charge accelerates electrolyte degradation during transit and warehousing. If the device reads low battery immediately after install, charge the pack fully before drawing any load. One complete charge cycle to 4.2V will bring the cell to rated operating condition.

Device rejecting the pack after swap — no power-on response

Some portable electronics run a voltage window check or BMS handshake before allowing the pack to supply the main board. If the replacement pack arrives below the device's minimum acceptance threshold, the firmware may block power-on entirely. Connect the device to its charger first, before attempting to power on. Once the charge IC brings the pack above the threshold voltage — usually around 3.0V to 3.4V — the handshake completes and the device will boot normally.

Replaces Part Numbers

1ICP/5/30/48 1S1P

Technical Specifications

Voltage3.7V
Amp Hours750mAh
Capacity750mAh
Rate2.78Wh
Net Weight19g /0.67 oz
Gross Weight44g /1.55 oz
Approximate Weight44g /1.55 oz
Dimension 49.38 x 32.40 x 5.40 mm

Product Highlights

  • Brand: Custom Battery Pack
  • 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

My device won't turn on at all after I put the new battery in — is the pack dead?

The pack is almost certainly not dead. Replacement Li-ion cells ship at storage voltage, and some devices run a minimum voltage check before allowing power-on. Connect the device to its charger for 15–30 minutes before pressing the power button. Once the cell climbs above the device's acceptance threshold — typically around 3.0V to 3.4V — it will boot normally.

The battery isn't reaching a full charge on the first cycle — the indicator stops early. What's happening?

On new cells, the charge IC often limits current during the first cycle as the cell's internal resistance settles. This causes the charge cycle to terminate earlier than expected, showing less than full capacity on the first pass. Run one complete charge-to-discharge cycle and then recharge fully. By the second cycle, the charge IC adjusts and the pack should reach its rated 750mAh without issue.

The pack feels warm during the first charge — should I be worried?

Mild warmth during the first charge is normal. A new Li-ion cell conditioning itself generates slightly more heat than subsequent cycles as the electrodes stabilise. If the pack becomes hot to the touch or the device feels uncomfortably warm, disconnect immediately and inspect for swelling. Mild warmth that dissipates within a few minutes of charging completing is within expected range for a 3.7V 750mAh cell.

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