Lenovo ThinkBook Plus G3 5B11H10608 Replacement Battery 15.44V
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Lenovo ThinkBook Plus G3 5B11H10608 Replacement Battery 15.44V - 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.
Lenovo ThinkBook Plus G3 5B11H10608 Replacement Battery 15.44V - is backordered and will ship as soon as it is back in stock.
Voltage
15.44V
Amp
4350mAh
Lenovo ThinkBook Plus G3 IAP — 15.44V Li-Polymer Replacement Battery (5B11H10608)
This 15.44V, 4350mAh (67.16Wh) Li-Polymer cell replaces OEM part numbers 5B11H10608, L21C4PH4, L21D4PH4, L21L4PH4, and L21M4PH4. It fits the ThinkBook Plus G3 IAP series — a 14-inch dual-screen business notebook with an integrated e-ink display. If the original cell has degraded or failed entirely, this restores full charging capability to the system.
- ThinkBook Plus G3 IAP series fit: All ThinkBook Plus G3 IAP variants share the same 15.44V four-cell battery rail, identical connector pinout, and compatible BMS handshake — which is why a single part number covers the full model range across regional SKUs.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the ThinkBook Plus G3 IAP platform. The BMS communicated correctly with the BIOS throughout, with no charge interruption, no false thermal cutoff, and steady voltage delivery across both the main display and the e-ink panel simultaneously.
- Post-swap calibration on the ThinkBook Plus G3 IAP: After installing, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in Lenovo Vantage after every cell swap.
BIOS reporting battery health as poor immediately after replacement
The ThinkBook Plus G3 IAP BIOS reads battery health data stored in the old cell's EEPROM and compares it against the new cell on first boot. Because the new cell has no accumulated cycle data, the BIOS flags it as unrecognised or degraded — not a fault with the replacement. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to complete a battery learn cycle and write fresh EEPROM data. After one or two full cycles, Lenovo Vantage and the BIOS will report health accurately. No firmware update is needed.
Laptop shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC on the motherboard is still calibrated to the old, degraded cell. The IC predicts voltage behaviour based on the previous cell's profile, so when the new cell hits its actual load voltage under combined CPU and e-ink panel draw, the reading drops faster than the IC expects — triggering an early shutdown. It is not a defect in the new cell. Perform a full calibration cycle: discharge to automatic hibernate, then charge to 100% without interruption. After two to three full cycles, the fuel gauge recalibrates to the new cell and cutoff returns to the correct voltage floor near 12.8V.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Lenovo
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-Polymer
- Battery Type: Li-Polymer
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
Lenovo Vantage shows the new battery as "0% available (plugged in, not charging)" right after install — what's wrong?
The BIOS has not yet completed a learn cycle with the new cell's EEPROM data, so it holds charging in a suspended state as a protection measure. Shut down completely, leave it unplugged for two minutes, then boot directly into BIOS setup (F1 at startup) and exit without changes. This forces a fresh battery detection handshake. If the issue persists after one full discharge-to-hibernate and recharge cycle, confirm the connector is fully seated — the ThinkBook Plus G3 IAP battery connector requires firm, even pressure to lock at all four points.
System info shows the battery capacity as 56Wh but the replacement is rated 67.16Wh — is it the wrong part?
The Wh figure shown in Windows Device Manager or Lenovo Vantage is pulled from the EEPROM on the old cell's data — not from the new one. Until the BIOS completes a full learn cycle, it reports the rated value stored from the previous battery. Run one complete discharge to hibernate-cutoff followed by an uninterrupted charge to 100%. After that cycle the system rewrites the EEPROM reference and the reported Wh figure will update to reflect the new cell's actual rating.
Charge stops at 80% and will not go higher — is the replacement cell faulty?
This is almost always the BIOS-controlled charge threshold in Lenovo Vantage, not a cell fault. Lenovo ships ThinkBook units with "Conservation Mode" active by default, which caps charging at 80% to slow cell wear over time. Open Lenovo Vantage, go to Device → Power, and switch the charge mode from "Conservation" to "Normal Charge." The battery will then charge to 100%. The replacement cell has no internal limiter — the 80% ceiling is enforced entirely by firmware.
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