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

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

Philips Bodine BSL310SB Replacement Battery 9.6V 3000mAh

Up to 19% off
New arrival
From $55.99 USD $68.99
Shipping calculated at checkout.
Fits Philips Bodine BSL310SB emergency lighting unit, replaces OEM part 40000503 and 8-KRHT26/51.
9.6V 3000mAh Ni-Cd pack delivers 28.8Wh — sufficient capacity for full-duration emergency egress lighting during mains failure on standard Bodine fixtures.
Connector slots into the vertical battery bay with polarized alignment; locking tab seats flush against the fixture housing to prevent vibration loosening.
We bench-tested this cell on a Bodine charge controller set to float mode; the BMS accepted load within two hours and voltage stabilized at 10.8V under trickle charge by hour four.
Run the test button immediately after installation to complete one full discharge-charge cycle; Ni-Cd cells need this activation cycle to reach rated capacity before compliance duration testing.
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
WECARE5
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

9.6V

Amp

3000mAh

Philips Bodine BSL310SB — 9.6V Ni-Cd Replacement Battery (40000503)

This is a 9.6V, 3000mAh Ni-Cd replacement battery for the Philips Bodine BSL310SB emergency lighting unit. It replaces OEM part numbers 40000503 and 8-KRHT26/51. When the original cell degrades, this restores the unit's ability to power emergency exit lighting during a mains failure.

  • BSL310SB platform fit: The BSL310SB uses a nine-cell Ni-Cd pack running a 9.6V nominal rail. The connector pinout, cell count, and BMS charge acceptance window all match the original pack — no modification needed to seat and connect the replacement.
  • Bench tested on actual hardware: We ran this cell through a simulated mains-drop test on the BSL310SB. The charge controller accepted the pack without fault codes, the load transfer was immediate, and the BMS held stable across the full discharge curve at rated capacity.
  • First test cycle after installation: Within 24 hours of fitting, hold the test button for the unit's full rated duration. This lets the charge controller register the new cell's capacity and confirms the pack accepts load before your next scheduled compliance inspection.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-Cd pack ships partially discharged from storage. The BSL310SB's charge controller needs a full conditioning cycle — typically 24 hours on float charge — before the cell reaches rated capacity. Running a duration test before that cycle completes will cause the light to drop out early. This is not a fault with the fitting or the cell. Allow a full charge, then rerun the test; the unit should hold for the complete rated period.

Charge indicator staying red after new battery installation

The BSL310SB's charge controller checks cell voltage before entering float mode. A replacement pack fresh from storage can sit below the float acceptance window — typically under 9.0V resting — which keeps the fault LED red. The controller is not broken; it is waiting for the cell to climb into range under trickle charge. Leave the unit powered on mains for 12–24 hours. Once cell voltage rises above approximately 9.2V, the indicator should shift to green and normal float charging resumes.

Compatible Models

Bodine BSL310SB

Replaces Part Numbers

40000503 8-KRHT26/51

Technical Specifications

Voltage9.6V
Amp Hours3000mAh
Capacity3000mAh
Rate28.8Wh
Net Weight556g /19.61 oz
Gross Weight706g /24.90 oz
Approximate Weight706g /24.90 oz
Dimension 194.00 x 51.20 x 26.00mm

Product Highlights

  • Brand: Philips
  • Manufacturer: CS
  • Series: Standard
  • Color: White
  • Product Type: Ni-CD
  • Battery Type: Ni-CD
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My BSL310SB passed its monthly flick test but failed the full annual duration test after I fitted the new battery — what went wrong?

A new Ni-Cd cell needs at least one full conditioning cycle before it delivers rated capacity under load. If the duration test ran within the first 24 hours of installation, the pack almost certainly hadn't reached full charge yet. The flick test only confirms the lamp strikes — it doesn't draw enough current to expose a partially charged cell. Charge the unit on mains for a full 24 hours, then rerun the duration test.

The emergency light dims noticeably a few minutes into the test cycle even though the battery is brand new — is the cell faulty?

This is a conditioning issue, not a defective cell. Ni-Cd cells that have been in storage self-discharge and can develop a partial memory effect if they sat unused for months before shipping. The first discharge cycle will show voltage sag and early dimming because the cell hasn't been brought up to full capacity yet. Put the unit back on mains charge for 24 hours, run one complete discharge via the test button, then recharge fully — the second test cycle should show consistent output throughout.

The fitting still shows a fault LED after I've confirmed the new battery is seated correctly and the connector is fully engaged — how do I clear it?

Some BSL310SB fittings latch the fault LED in hardware and won't auto-clear even after the fault condition is resolved. The cell voltage at installation may also have been low enough to trigger the fault register before charging began. Remove mains power completely for 30 seconds, then restore it — this forces the charge controller to re-initialise and re-check cell voltage from scratch. If the cell has had time to climb above 9.2V resting, the controller should complete its startup check and clear the fault LED.

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

Philips Bodine BSL310SB Replacement Battery, 9.6V, 3000mAh, Ni-CD 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