Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

SENAO DR35 Ni-MH Replacement Battery 10.8V 4000mAh

Up to 19% off
New arrival
From $84.99 USD $104.99
Shipping calculated at checkout.
Fits SENAO DR35 and DR35S notebook batteries requiring 10.8V restoration.
10.8V and 4000mAh capacity sustains full CPU and display load across work sessions.
Connector matches OEM slot orientation with standard locking tab for secure seating.
Bench testing confirmed stable voltage delivery under sustained draw; Ni-MH BMS accepted without fault codes.
After installation, discharge fully to sleep mode then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false health warnings.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

10.8V

Amp

4000mAh

SENAO DR35 / DR35S — 10.8V Ni-MH Replacement Battery

This is a 10.8V, 4000mAh (43.2Wh) Ni-MH battery for SENAO notebooks and laptops using the DR35 or DR35S battery part number. It replaces cells that have lost charge retention over repeated cycles. Fit is confirmed against OEM part numbers DR35 and DR35S.

  • DR35 and DR35S platform: Both part numbers share the same voltage rail, connector pinout, and physical form factor — 214.50 × 52.00 × 18.50mm. Either OEM number on your original cell confirms fitment with this replacement.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on the bench. The BMS accepted charge normally, held voltage through the discharge curve, and cut off cleanly at the low-voltage threshold without false trips.
  • Post-install calibration cycle: After fitting, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on SENAO notebooks.

BIOS reporting poor battery health immediately after swapping the DR35

The BIOS reads EEPROM data written by the original cell. When a new cell goes in, the EEPROM signature does not match the learned charge curve, so the system flags poor health. This is not a fault with the replacement cell. Run one complete discharge-to-hibernate followed by a full uninterrupted charge. After one to three cycles the BIOS recalibrates its learn table and the health warning clears.

Laptop shuts down suddenly at 20–30% charge shown on screen

The fuel gauge IC is still referencing the capacity curve of the old, degraded cell. When CPU load and display draw spike together, the new cell's actual voltage briefly dips below what the uncalibrated gauge expects at that percentage, triggering an emergency shutdown. The fix is calibration — not a hardware fault. Discharge fully to hibernate cutoff three times in a row, charging to 100% between each pass. After those cycles the fuel gauge IC maps its readings against the new cell's true voltage curve and the phantom shutdowns stop.

Replaces Part Numbers

DR35 DR35S

Technical Specifications

Voltage10.8V
Amp Hours4000mAh
Capacity4000mAh
Rate43.2Wh
Gross Weight140g /4.94 oz
Approximate Weight140g /4.94 oz
Dimension 214.50 x 52.00 x 18.50mm

Product Highlights

  • Brand: SENAO
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The SENAO laptop shows the battery Wh rating as wrong in system info after I installed the DR35 — is the cell faulty?

No. The Wh figure displayed in system info is pulled from EEPROM data the old cell wrote to the BMS, not measured live from the new cell. The DR35 replacement carries a rated 43.2Wh, but until the BIOS runs a full learn cycle, it keeps displaying the previous cell's stored value. Complete one full discharge to hibernate cutoff followed by a charge to 100% and the system info figure will update to reflect the new cell.

The fuel gauge reads wildly different percentages on every boot — 47%, then 81%, then 12% — after fitting the replacement DR35.

This is the fuel gauge IC cycling through stale reference points from the old cell's learned discharge curve. The IC has not yet mapped the voltage behaviour of the new Ni-MH cell. Run three consecutive calibration cycles — full discharge to hibernate cutoff, then uninterrupted charge to 100% each time. By the third cycle the IC has enough real data to track the DR35's actual voltage curve and the gauge stabilises.

The DR35 replacement stops charging at around 80% and won't go higher — SENAO laptop on Windows 11.

Check the BIOS power settings before assuming a cell fault. Many SENAO notebooks ship with a charge limit set in firmware — typically 80% — to reduce cell wear during continuous AC use. Open the BIOS, navigate to the power or battery management section, and either disable the charge limit or raise the threshold to 100%. If no such setting exists, check any manufacturer power utility installed in Windows — that utility can impose the same cap outside the BIOS.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Duracell Replacement Battery, 10.8V, 4000mAh, Ni-MH 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections