AJC Battery Compatible with John Deere JS35 Lawn Mower and Tractor Battery

What It Is

This is a 12-volt, sealed lead-acid (SLA) replacement battery designed for John Deere JS35 walk-behind mowers and select compact lawn tractors. It provides starting power for engines requiring a U1-sized battery.

Fitment & Compatibility

Before buying, verify two things: physical dimensions and terminal orientation. The AJC battery measures approximately 7.7" L x 5.1" W x 6.2" H (U1 group size). It fits John Deere JS35 mowers and some models like the LA105, LA115, and D100 series tractors. However, check your mower’s battery tray to ensure the height (6.2") doesn’t interfere with the seat or hood. Also confirm the positive terminal is on the left when facing the battery (standard for most Deeres). This is an aftermarket replacement, not OEM John Deere—OEM part numbers include AM117358 or AM117359. Measure your old battery’s dimensions and terminal layout before ordering; the 2.7 rating suggests fitment issues for some buyers.

Key Things to Know

• Quality concerns: With a 2.7-star rating from only 11 reviews, this battery has a higher-than-average failure rate—some report short lifespan (under one season) or dead-on-arrival units.
• Installation is simple: No special tools needed—just a 10mm wrench for the terminal nuts. The battery is fully sealed, so no maintenance or water refill required.
• Cold cranking amps (CCA): Typically rated around 230 CCA. This is fine for small engines (up to ~20 HP), but may struggle in freezing temps if your mower sits outside.
• Return hassle: Given the low rating, factor in potential return shipping costs if it fails early. Check the seller’s warranty policy (often only 30 days).

Should You Buy It

This battery is only a good choice if you’re on a strict budget and need a quick, temporary replacement for a mower you plan to sell or use lightly. Avoid it if you rely on your mower for regular, heavy-duty use or live in a cold climate—spend $10-15 more for a well-rated brand like Mighty Max or ExpertPower, which have much better reliability and longer warranties.