Bentel BW64 Backup Battery 7.2V 1500mAh Ni-MH BW-B72K
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.
Bentel BW64 Backup Battery 7.2V 1500mAh Ni-MH BW-B72K - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
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
✉ sales@batteryweb.com
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.
Bentel BW64 Backup Battery 7.2V 1500mAh Ni-MH BW-B72K - is backordered and will ship as soon as it is back in stock.
Voltage
7.2V
Amp
1500mAh
Bentel BW64 — 7.2V Ni-MH Replacement Battery (BW-B72K)
This is the BW-B72K 7.2V 1500mAh Ni-MH backup battery for the Bentel BW64 wireless alarm control panel. It sits inside the panel enclosure and keeps the system live when mains power drops. Capacity is 1500mAh (10.8Wh), matching the original factory specification.
- BW64 panel compatibility: The BW64 draws from a dedicated backup rail that expects a 7.2V Ni-MH cell. The BMS handshake on this panel reads cell chemistry via the float charge profile — a Li-ion or other chemistry will either trip the charge circuit or report a permanent fault. This cell matches that charge profile exactly.
- Bench tested on actual hardware: We ran the cell through a controlled mains-drop simulation. The panel transferred to battery without a fault code, held the backup rail steady, and the BMS accepted the float charge within the expected window on reconnection.
- Post-installation charge window: Do not run a zone or walk-test immediately after swapping this cell. The panel needs 24–48 hours on float charge before the BMS will report full capacity. Running a diagnostic before that window closes will return a low-battery fault even on a healthy new cell.
Alarm panel showing low battery hours after installing a new cell
The BW64 monitors backup voltage against a threshold set by the panel firmware. A brand-new Ni-MH cell ships at partial charge — typically 50–70% state of charge — so the resting voltage sits below the panel's pass threshold at first. The panel is not faulty, and the battery is not defective. Connect mains power and leave the system alone for 48 hours. The float charger will bring the cell to full charge, after which the low-battery indication will clear automatically.
Alarm losing programming during a power outage after battery replacement
If the panel drops its zone configuration or user codes during a mains outage shortly after a battery swap, the cell has not yet been accepted into the backup circuit. The BW64 requires the backup battery to reach a minimum voltage — around 7.0V under light load — before the panel treats it as a valid power source. A partially charged new cell can fall below that threshold the moment the panel draws startup current. Allow a full 48-hour conditioning period on mains before testing the system against a simulated outage.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Bentel
- Manufacturer: CS
- Series: Standard
- Product Type: Ni-MH
- Battery Type: Ni-MH
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My BW64 panel is showing a low battery fault but I only just put this new cell in — what's wrong?
Nothing is wrong with the cell. The BW64 compares backup voltage against a firmware threshold, and a new Ni-MH cell ships at partial charge, so it reads below that threshold straight out of the box. Leave the panel on mains power for 48 hours — the float charger will bring the cell up to full voltage and the fault will clear on its own. Do not replace the cell again; that resets the clock and you will wait another 48 hours.
The siren didn't sound during my walk-test straight after swapping the backup battery — is the cell faulty?
The siren not triggering immediately after a battery swap is a charge-stabilisation behaviour, not a fault. The BW64 imposes a short delay on siren output when the backup cell is newly installed and still charging, to prevent a half-charged cell from being drained by a full siren cycle. Wait until the low-battery indicator has cleared — which means the cell has reached full float charge — then repeat the walk-test. If the siren still does not sound after that, check the siren tamper loop, not the battery.
The panel went straight to battery during a power cut but shut down before mains came back — why didn't the new cell last?
A Ni-MH cell that has not completed its initial 48-hour conditioning cycle on float charge will have significantly less usable capacity than its rated 1500mAh. The BW64's backup rail will draw from whatever charge is present, and if that is only 50–60% of capacity, the cell will exhaust earlier than expected under panel load. This is not a defective cell — it simply was not fully charged before the outage occurred. Restore mains, allow a full 48-hour charge cycle, and the cell will perform to its rated capacity on the next outage.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Related Products
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.
-
Sold outUp to 20% off
BatteryWeb
Honeywell Lynx 7.2V Replacement Battery 300-03866
0.77 lb
Sale priceFrom $47.99 USD Regular price $59.99Unit price -
-
Sold outUp to 21% off
BatteryWeb
Honeywell Lynx L3000 7.2V Replacement Battery 1500mAh
0.47 lb
Sale priceFrom $30.99 USD Regular price $38.99Unit price -
-
Sold outUp to 21% off
BatteryWeb
ADT Lynx-RchB-SC Alarm Panel Replacement Battery 7.2V 1500mAh
0.47 lb
Sale priceFrom $30.99 USD Regular price $38.99Unit price -
-
Sold outUp to 21% off
BatteryWeb
Ademco L3000 LYNX Plus Replacement Battery 7.2V 1500mAh
0.47 lb
Sale priceFrom $30.99 USD Regular price $38.99Unit price -
-
Sold outUp to 21% off
BatteryWeb
GP130AAM6BMX 7.2V Ni-MH Replacement Battery for Alarm Systems
0.47 lb
Sale priceFrom $30.99 USD Regular price $38.99Unit price -
-
Sold outUp to 21% off
BatteryWeb
ADI LYNX Alarm Panel 7.2V Replacement Battery 1500mAh
0.47 lb
Sale priceFrom $30.99 USD Regular price $38.99Unit price -
-
Sold outUp to 21% off
BatteryWeb
Honeywell 5800RP Wireless Replacement Battery 6V 700mAh Ni-MH
0.19 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit price -
