We don’t rush batteries out the door. We do five things so it works when you turn the key:

1. Fill with 1.265 SG electrolyte to spec.
2. Soak for full glass-mat absorption.
3. High-frequency forming charge (~900 mA) to form the plates.
4. Rest and verify it holds 12.6–12.8V.
5. Final QC. Ships ready to install.

Pro Tip: Want it to last 8–12 years? After you park, keep it on a smart maintainer. That habit keeps it topped up and ready.

See the full photo walkthrough: How we make them last.

• Cold starts: Cranks in bad weather instead of clicking.
• Accessories: Stable voltage for GPS, LEDs, and light winch work.
• Vibration: AGM handles washboard roads and trail hits.
• Mounting: Mount upright or on its side. Don’t mount upside down.
• Storage: If it sits, keep it on a maintainer so it’s ready when you are.

Common OEM numbers this battery replaces: WPX9-BS, CTX9-BS, YTX9-BS, WP9-BS, FTX9-BS, GTX9-BS, EXT9C, PTR9-BS, and more.

Please contact us if you’d like help choosing the right battery for your machine — our team is here to help.

Battery: 30-Day Full Replacement — no proration, no hassle.

Charger: 1-Year Manufacturer’s Warranty on the BRS612 maintainer.

• Type: Automatic smart charger / maintainer / rejuvenator
• Input: 100–120 VAC, 50/60 Hz · Output: 1000 mA @ 6V/12V
• Size: 105 × 68 × 35 mm · Weight: 0.5 kg
• Approvals: UL/cUL, FCC, CEC
• Includes: Eyelet Plug Adapter for easy under-seat access
• 3-stage charging, then maintenance — won’t overcharge
• Protection: short-circuit, reverse polarity, overload
• Charger Warranty: 1-Year Manufacturer’s Warranty

More about the charger: BRS612 product page

• Chemistry: Lead Acid AGM / VRLA (Pb)
• Nominal Voltage: 12V
• Capacity (Ah @10hr): 9Ah
• CCA: 135
• Dimensions: 5.87″ L × 3.43″ W × 4.12″ H (149.1 × 87.1 × 104.6 mm)
• Terminals: Type 5
• Weight: 6.28 lb (2.84 kg)
• Brand: BRS Battery Ltd. / BRS Super Battery

Do I need to charge it first?

No. It ships charged and ready.

Why include a maintainer?

Machines sit. The maintainer keeps it topped up so it starts when you need it.

Where’s my model number?

On the face label (e.g., YTX9-BS). This BRS9-BS replaces that size.

How is this different from a cheap battery?

We soak, form, and test each one. No acid splash-and-dash. That’s why it cranks harder and holds charge longer.

How cold will it work?

AGM will run in tough weather. Keep it charged and it handles winter starts well.