Daitem BAT11 D5142 Replacement Battery 3.7V 90mAh
This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.
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Daitem BAT11 D5142 Replacement Battery 3.7V 90mAh - 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.
Daitem BAT11 D5142 Replacement Battery 3.7V 90mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
90mAh
Daitem D5142 / SC100AU / SC101AX Alarm Panel — 3.7V Li-Polymer Replacement Battery (BAT11)
This is the BAT11 Li-Polymer cell used in Daitem alarm control panels including the Logisty-Diagral-Hager D5142, SC100AU, SC101AX, and D5130GB series. It runs at 3.7V with a 90mAh (0.33Wh) capacity. The cell maintains backup memory and wireless communication functions when mains power drops.
- D5142 / SC100AU / SC101AX compatibility: These panels share the same 3.7V backup rail, BAT11 connector footprint, and BMS handshake protocol. The cell dimensions — 21.10 × 12.00 × 5.30mm — must match exactly for proper seating in the battery bay.
- Bench tested on actual hardware: We cycled this cell through charge and BMS communication checks on a D5142 panel. The BMS accepted the cell without fault codes and completed the float-charge acceptance cycle within the expected window.
- Post-installation conditioning: Do not run a zone or diagnostic test immediately after fitting this cell. Allow 24–48 hours on float charge first. The panel samples backup voltage during the test cycle — a fresh cell that has not completed acceptance will trip a low-battery report even if the cell is healthy.
Alarm panel losing programmed zones during a power outage after battery swap
A freshly installed BAT11 cell needs time on the panel's float charge circuit before it can sustain memory backup voltage. If mains power cuts before the cell has fully accepted charge, the panel voltage can drop below the memory-retention threshold — typically around 3.0V — and zone configuration is lost. This is not a faulty cell; it is a timing issue. Fit the new cell, restore mains power, and leave the panel undisturbed for 48 hours before the next planned outage or test.
Panel still showing low-battery fault 30 minutes after fitting a new BAT11
The D5142 and related panels poll backup battery voltage on a timed cycle, not instantly. Immediately after installation, the cell's resting voltage may sit slightly below the panel's report threshold — especially if the cell has been in storage. The panel will clear the fault automatically once the float charge circuit raises cell voltage above approximately 3.6V, which typically happens within the first 24–48 hours. Do not replace the cell again; leave mains power connected and recheck the panel status after 48 hours.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Daitem
- 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
The siren didn't sound during our weekly test right after I swapped the BAT11 — is the new battery dead?
The siren is not dead. After a battery swap, the D5142 panel applies a 30–60 second charge-stabilisation delay before it will trigger the siren output on a test signal. This prevents a false-trip on a cell that has not yet reached operating voltage. Wait at least one minute after the test signal before concluding there is a fault, then re-run the test. If the siren still does not sound, check that the panel lid is fully closed — an open tamper loop will suppress the siren output independently.
My Daitem panel shows a tamper fault straight after replacing the backup battery — I haven't touched anything else.
A tamper fault after a battery swap almost always means the panel cover or battery compartment lid is not fully seated. The D5142 series uses a tamper switch that triggers if the housing is even slightly ajar. Press all four corners of the lid firmly until you hear or feel it click, then check the panel display. If the fault clears, no further action is needed. If it persists with the lid fully closed, check whether the tamper switch actuator pin was displaced during the battery access.
The panel lost all its zone programming during last night's power cut even though I fitted a new BAT11 two days ago — what went wrong?
Two days may not be enough if mains power was interrupted before the float charge cycle completed. The BAT11 needs a continuous 48-hour charge period with no power interruptions to fully accept charge and hold memory backup voltage above 3.0V. If mains power dipped or the circuit breaker tripped during that window, the conditioning cycle resets. Restore mains power, re-enter the zone programming, and allow a full uninterrupted 48 hours before the next outage or scheduled test.
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