402035 250mAh 3.7V Battery for DVR Dash Cam 368A 526 518 528 538 36x29x4mm Replacement

Description

Battery model: 402035
Capacity: 250mAh / 0.925Wh
Rated voltage: 3.7V
Charge limit voltage: 4.2V
Battery type: Li-ion Polymer (Grade A cells)
Dimensions: 36mm × 29mm × 4mm
Compatible with: DVR 368A, 526, 518, 528, 538, 536, 408A, 658, 668, 688, 772, 790, and similar dash cam models
Package include: 1 x battery
Restore the backup power of your dash cam with this 402035 250mAh replacement battery. Dash cams rely on a small internal battery to perform a critical function: saving the final recording when the car’s power is cut. Without a healthy backup battery, your dash cam may fail to save the last few seconds of footage before shutdown — potentially losing crucial evidence in an accident. After 2-3 years of use in hot car environments, the original battery often degrades significantly. This Li-ion Polymer battery restores the full 250mAh capacity, ensuring your dash cam saves every recording reliably. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Why This Battery Matters for Your Dash Cam — And How to Know It’s Time to Replace: The 402035 battery is a standard size used in many DVR dash cams. Its primary job is not to power the camera for hours, but to provide just enough energy to properly close the video file and save the last recording when the ignition is turned off. Common symptoms of a failing battery include: the dash cam no longer saving the final video when the engine shuts off, the date and time resetting every time you start the car, the device powering off immediately when unplugged instead of shutting down gracefully, or the battery swelling inside the unit. This replacement battery is compatible with a wide range of DVR models including the 368A, 526, 518, 528, 538, 536, 408A, 658, 668, 688, 772, and 790 series. The 402035 name refers to the battery’s dimensions — approximately 4.0mm thick, 20mm wide, and 35mm long (36×29×4mm in this variant). Before purchasing, please measure your original battery to confirm it matches 36×29×4mm. Unlike phone batteries, dash cam batteries are typically soldered directly to the circuit board or connected with a small 2-pin JST connector — this battery comes with pre-soldered wires or connector based on your device’s original configuration. If you’re comfortable with basic soldering, replacement is straightforward; otherwise, professional installation is recommended.
Compatibility Note: Compatible with DVR models 368A, 526, 518, 528, 538, 536, 408A, 658, 668, 688, 772, 790, and similar dash cams using 402035 battery. Please verify your device’s battery size (36×29×4mm) and connection type before purchasing. This battery is NOT compatible with dash cams using different battery sizes such as 402030, 502030, or 602030. Always check your original battery dimensions before ordering.