Bticino 4216 Alarm Panel Replacement Battery 7.4V 900mAh
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Bticino 4216 Alarm Panel Replacement Battery 7.4V 900mAh - 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.
Bticino 4216 Alarm Panel Replacement Battery 7.4V 900mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
900mAh
Bticino 4216 / 4280 — 7.4V Li-Polymer Replacement Battery (4238)
This 7.4V 900mAh Li-Polymer cell replaces the Bticino 4238 backup battery in the 4216 and 4280 alarm system control panels. It keeps the panel live during a mains failure so zones, alerts, and system monitoring stay active. Dimensions are 50.10 × 28.00 × 13.00mm — match these before fitting.
- 4216 and 4280 compatibility: Both panels share the same battery bay, 7.4V supply rail, and 4238 part number. The BMS handshake on each panel expects a Li-Polymer cell at this voltage — substituting a different chemistry trips a fault condition.
- Bench tested on actual hardware: We ran this cell through charge acceptance and float voltage on a controlled load. The BMS accepted the cell without fault codes, and float voltage stabilised at the correct level within the expected window.
- Post-installation float charge: Do not run a zone or siren test immediately after fitting. Allow 24–48 hours on mains power so the panel completes its float charge cycle. Testing before that window closes can cause the panel to flag a low-battery condition even on a healthy new cell.
Alarm panel losing programming during a power outage after a battery swap
The 4216 and 4280 store zone configuration and user codes in volatile memory backed by the battery rail. If the panel loses that rail during a mains outage before the new cell is fully conditioned, it cannot hold the memory buffer long enough. The panel then boots to factory defaults when power returns. A 48-hour conditioning period on mains after fitting the new cell lets the charge controller fully accept the cell before it is called on.
Panel showing low battery fault within hours of fitting a new cell
This is a charge-state reporting issue, not a faulty cell. The panel reads the cell's open-circuit voltage on first boot and logs a low-battery event because the new cell has not yet reached float charge. The fault clears on its own once the panel has been on mains for 24–48 hours and the charge controller brings the cell to its target voltage. If the fault persists beyond 48 hours, check that mains power is stable and the connector is fully seated.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Bticino
- Manufacturer: CS
- Series: Standard
- Color: Blue
- Product Type: Li-Polymer
- Battery Type: Li-Polymer
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The siren didn't sound during a test walk straight after I replaced the 4238 battery — is the cell faulty?
The cell is almost certainly fine. The 4216 and 4280 panels impose a short charge-stabilisation delay after a new backup cell is fitted, and some firmware versions suppress the siren output until the battery rail clears its threshold. Wait the full 24–48 hour float charge period, then re-run the siren test. If the siren still fails to trigger after that window, verify the siren tamper circuit and check for a separate siren fault code on the panel.
My 4216 panel showed a tamper fault immediately after I swapped the battery — I didn't touch anything else.
A tamper fault after a cell swap almost always means the panel enclosure lid or battery cover isn't fully closed. The 4216 has a tamper switch on the casing; if the cover sits even slightly proud of its frame, the switch stays open and logs a tamper event. Remove the cover, reseat it firmly until it clicks flush, then check the panel log — the tamper fault should clear within a few seconds of the switch closing.
The 4216 reset to factory defaults during a power cut even though I fitted a new backup battery two days ago.
Two days is enough for float charge, so check the physical connection first — the connector on Li-Polymer packs can look seated but still have a loose pin. Unplug and firmly reseat the battery connector, then confirm the panel shows no battery fault on mains power. If the connector is solid and the fault repeats on the next outage, measure the cell voltage directly: a healthy charged 4238 replacement should read between 8.2V and 8.4V at the terminals before the panel draws from it.
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