Toyota Camry VIII XV70 3.2V LiFePO4 Replacement Battery 282A41872R
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Toyota Camry VIII XV70 3.2V LiFePO4 Replacement Battery 282A41872R - is backordered and will ship as soon as it is back in stock.
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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.
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Toyota Camry VIII XV70 3.2V LiFePO4 Replacement Battery 282A41872R - is backordered and will ship as soon as it is back in stock.
Voltage
3.2V
Amp
1500mAh
Toyota Camry VIII XV70 / RAV4 XA50 — 3.2V LiFePO4 Replacement Battery (282A41872R)
This is a 3.2V, 1500mAh LiFePO4 cell that replaces part number 282A41872R in the Toyota Camry VIII XV70 and RAV4 2021 XA50 (A25AFXS). It powers the vehicle's emergency supply module — the backup circuit that keeps critical safety functions active when the main 12V battery is depleted. Capacity is 1500mAh (4.8Wh) as specified for this application.
- Camry VIII XV70 and RAV4 XA50 fitment: Both platforms share the same 282A41872R emergency supply cell because Toyota uses an identical backup module and BMS handshake across the XV70 and XA50 chassis — same connector, same 3.2V LiFePO4 voltage rail, same charge termination protocol.
- Bench tested on actual hardware: We cycled this cell through the module's charge-and-accept sequence and confirmed the BMS recognised the cell, completed charge termination cleanly at 3.65V, and released the emergency supply circuit for normal standby operation.
- Post-install initialisation: After fitting, leave the vehicle on ACC or ignition-on for at least two hours so the module can complete its charge cycle. Until the cell reaches full charge, the emergency supply management system will not commit the battery to standby duty — do not rely on the backup circuit until the module indicator clears.
Why the emergency supply module shows a battery fault immediately after installation
The Toyota emergency supply module runs a firmware-controlled battery-check sequence every time a new cell is detected. This sequence takes up to two hours at a low trickle charge rate before the module logs the cell as accepted. During that window, a battery fault or warning light on the instrument cluster is normal — it does not indicate a faulty cell. The module checks internal resistance and open-circuit voltage before clearing the fault. Keep the ignition in ACC or start the vehicle and let it idle until the warning clears.
Emergency supply not activating during a main battery failure after swap
If the emergency supply fails to activate during a main battery loss event after a cell replacement, the most common cause is that the new cell had not completed its first full charge cycle before the event occurred. LiFePO4 cells ship in a partial state of charge — typically 30–50% — and the module's BMS will not hand off to emergency power from a cell it has not yet fully accepted. Charge the cell to 3.65V through the vehicle's own charge circuit before testing the backup function. If the module still does not activate, check connector seating at the module harness before replacing the cell.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Toyota
- Manufacturer: CS
- Series: Standard
- Color: Blue
- Product Type: LiFePO4
- Battery Type: LiFePO4
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The battery warning light came on as soon as I fitted the new 282A41872R cell — is the cell faulty?
Almost certainly not. The Toyota emergency supply module runs an internal battery-check sequence any time a new cell is detected, and it flags a warning until that sequence finishes. This takes up to two hours at a trickle charge rate. Leave the ignition on ACC for two hours and the warning should clear on its own once the module accepts the cell.
The self-test on my Camry XV70 emergency module is failing even after the warning light cleared — what's wrong?
A self-test failure after the initial warning clears usually means the cell has not yet completed a full charge-discharge calibration cycle. The module needs one complete charge to 3.65V followed by a load test before it trusts the runtime estimate and logs a pass. Run the vehicle normally for a full drive cycle, then trigger the self-test again from the vehicle's diagnostic menu. If it still fails, check that the cell voltage at the module connector reads 3.2–3.65V with a multimeter.
My RAV4 XA50 emergency backup drained the new cell faster than expected — is the 1500mAh rating wrong?
The 1500mAh rating is correct, but actual backup duration depends on how many circuits the module is powering during a main battery loss event. Heated seats, infotainment, or other ACC loads drawing through the backup circuit will shorten available capacity significantly. At elevated cabin temperatures — above 35°C — LiFePO4 self-discharge also accelerates, so a cell left uncharged in a hot parked vehicle loses standing capacity. Park in shade where possible and ensure the vehicle charges the emergency cell during each ignition cycle by confirming the module status light shows green after a drive.
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