1st Gen Generation (2022–2026)
2025 Rivian R1S Battery Size & Specs
BCI Group Size
12V Dual Auxiliary AGM (Group 51R / Lithium)
Cold Cranking Amps
450 CCA
Chemistry / Type
Dual 12V Auxiliary AGM Pack
Hold-Down Torque
3.5 to 4.5 ft-lbs (40 to 54 in-lbs / 5 to 6 Nm)
Factory OEM Battery Specifications
| BCI Group Size | 12V Dual Auxiliary AGM (Group 51R / Lithium) |
|---|---|
| Minimum Cold Cranking Amps | 450 CCA (0°F / -18°C) |
| Cranking Amps at 32°F | 562 CA |
| Terminal Configuration | SAE Automotive Top Post — Right Positive (+) |
| Tray Dimensions (L x W x H) | 9.3 x 5.1 x 8.8 in |
| Bracket Bolt Socket Size | 10mm socket |
| Hold-Down Clamp Torque | 3.5 to 4.5 ft-lbs (40 to 54 in-lbs / 5 to 6 Nm) |
| Estimated DIY Retail Cost | $180 to $250 |
Recommended Replacement Batteries & Tools
OEM Replacement
12V Dual Auxiliary AGM (Group 51R / Lithium) Premium Battery
Direct-fit BCI 12V Dual Auxiliary AGM (Group 51R / Lithium) replacement battery engineered with 450 minimum cold cranking amps for reliable starting.
Check Price on Amazon →
Battery Care
Smart 12V Battery Maintainer
Automatic multi-stage smart charger that prevents parasitic drain, recovers deeply discharged cells, and extends AGM battery life.
View Charger on Amazon →
Installation Kit
Terminal Cleaner & Protectant
Professional corrosion preventative spray and wire post brush kit to guarantee zero electrical resistance on battery terminals.
View Spray on Amazon →SelectMyBlog participates in affiliate programs and may earn commissions from qualifying purchases.
Step-by-Step Battery Replacement Procedure
Replacing the 12-volt battery on the 2025 Rivian R1S requires standard hand tools and adherence to electrical safety protocols:
- Step 1 (Safety Isolation): Turn off the ignition, set the parking brake, and remove the key fob. Wear ANSI-approved safety glasses and insulated work gloves.
- Step 2 (Negative Disconnect First): Use a 10mm wrench to loosen the Negative (Black / Minus) terminal clamp nut. Twist and lift the clamp clear of the terminal post to break chassis ground.
- Step 3 (Positive Disconnect Second): Loosen the Positive (Red / Plus) terminal clamp nut and secure the cable safely aside.
- Step 4 (Hold-Down Bracket Removal): Unbolt the 10mm base clamp hold-down bracket and lift the old battery vertically out of the vehicle tray.
- Step 5 (Tray Cleaning & Seating): Scrape corrosive acid deposits from the tray using a wire brush. Lower the new 12V Dual Auxiliary AGM (Group 51R / Lithium) battery into place.
- Step 6 (Torque & Reconnection): Secure the hold-down clamp to 3.5 to 4.5 ft-lbs (40 to 54 in-lbs / 5 to 6 Nm). Reconnect the Positive (+) terminal first, then the Negative (-) terminal last.
Frequently Asked Questions
What battery size does a 2025 Rivian R1S take?
The 2025 Rivian R1S requires a BCI 12V Dual Auxiliary AGM (Group 51R / Lithium) 12-volt battery with a minimum rating of 450 Cold Cranking Amps (CCA).
Does this vehicle require an AGM or standard flooded battery?
Dual 12V Auxiliary AGM Pack. If equipped with engine start-stop technology, an AGM battery is mandatory to support continuous micro-cycling.
Why must the negative battery terminal be disconnected first?
Disconnecting the negative cable first eliminates the danger of an electrical short circuit if a metal tool accidentally touches the vehicle metal chassis while loosening the terminal.
How long does a 12V car battery last?
Most automotive batteries last between 3 to 5 years depending on climate, daily driving distance, and alternator charging performance. High ambient heat accelerates grid corrosion.