Product Specifications for Replacement Ring Home Security Camera Battery (3.8V, 5.2Ah, Li-Poly)
| BM Part #: | CS-RUM550SL |
|---|---|
| Voltage: | 3.8 Volt |
| Capacity: | 5200 mAh |
| Type: | Li-Poly |
| Length: | 2.25" |
| Width: | 1.94" |
| Height: | 0.48" |
| Shipping Weight: | 0.23Lbs (3.68 oz) |
| Warranty: | 6 Month |
- Exact-fit replacement for Ring Video Doorbell 2nd Generation: Engineered to match OEM dimensions (54.70 × 49.70 × 10.50mm) and the 5-pin connector for a drop-in swap with no modifications required.
- High-capacity 4200mAh / 15.96Wh cell: Delivers reliable, long-lasting power so your doorbell stays online and recording without constant recharging.
- Lightweight Li-Polymer construction: At just 60g, this slim polymer cell fits cleanly inside the original housing without adding bulk or stressing the battery door.
- Compatible with Ring part numbers S1 and 1ICP6/5056-2 (model 5UM5E5): Verified cross-reference so you can order with confidence.
- Quality-tested at 3.8V nominal voltage: Matches Ring's OEM electrical spec to protect your doorbell's charging circuit and firmware.
Product Description
When your Ring Video Doorbell 2 stops holding a charge, you don't need to replace the whole unit. This Li-Polymer replacement battery restores full power to your doorbell in minutes, keeping your home protected without the cost of a brand-new device.
Built to Fit Ring Doorbell 2nd Gen — Nothing Else Needed
This battery is a direct replacement for the Ring Video Doorbell 2nd Generation (also sold as model 5UM5E5, part numbers S1 and 1ICP6/5056-2). It uses the same 5-pin connector as the original battery, so installation is as simple as sliding it into place — no soldering, no adapters, no guesswork.
More Capacity, Same Compact Size
At 4200mAh and 15.96Wh, this replacement cell is designed to keep your doorbell online longer between charges. It operates at the 3.8V nominal voltage your Ring requires, so charging behavior and battery-level reporting in the Ring app work just as expected. The slim Li-Polymer form factor (54.70 × 49.70 × 10.50mm) fits perfectly in the original battery bay.
A Smarter Fix Than Buying a New Doorbell
Lithium-polymer batteries naturally degrade over time — typically after 2–4 years of regular use. If your Ring doorbell is draining faster than it used to, a fresh battery is all it needs. At a fraction of the cost of a new Ring device, this replacement extends the life of hardware you already own and trust.
What's in the Box
- 1× CS-RUM550SL Li-Polymer Replacement Battery (3.8V, 4200mAh)
- 5-pin connector pre-installed
Compatible with: Ring Video Doorbell 2nd Generation, Ring Video Doorbell 2 Generation | Model 5UM5E5 | Ring Part No. S1, 1ICP6/5056-2
Frequently Asked Questions
Will this battery fit my Ring Video Doorbell?
This battery is specifically designed for the Ring Video Doorbell 2nd Generation (model 5UM5E5). It is not compatible with Ring Doorbell 1st generation, Ring Doorbell 3, Ring Doorbell 4, or Ring Pro models. If you're unsure of your model, check the back of the device or your Ring app under Device Health.
How do I replace the battery in my Ring Doorbell 2?
Use the included security screwdriver (or a star-bit screwdriver) to remove the faceplate. Slide out the old battery, disconnect the 5-pin connector, connect the new battery, and slide it back into place. Reattach the faceplate and charge via micro-USB before first use.
Is this an OEM Ring battery?
No — this is a high-quality aftermarket replacement battery, not an official Ring product. It is engineered to match the original electrical specifications (3.8V, 5-pin connector) and physical dimensions of the OEM battery.
How long will this battery last before needing a replacement?
Battery life varies based on motion activity, live view usage, temperature, and Wi-Fi signal strength. Under typical conditions, a fully charged Ring Doorbell 2 battery can last several months between charges. The cell itself is rated for hundreds of charge cycles before capacity noticeably degrades.
Can I keep a spare battery charged and swap it out?
Yes — many Ring Doorbell 2 owners keep a second battery charged so they can swap immediately and avoid any downtime. This is one of the most popular reasons customers purchase a second unit.
Cross Reference & Compatibility
- Ring 1ICP6/5056-2
- Ring S1
This battery can be used in these models:
- Ring 5UM5E5
- Ring Video Doorbell 2 Generation
- Ring Video Doorbell 2nd
Customer Reviews
Great battery
