Best (Affordable) Battery for a 2010 Lexus RX350

A dead car battery used to mean a cheap pro-rated replacement. That’s no longer how it works — parts stores quoted $179-$200 for a new battery with no pro-rating. That price gap is what sends this toward a budget alternative instead.

Removing the Old Battery

1. Undo the two hold-down points. One takes a 10mm socket; a deep well socket works better on the other.
2. Disconnect the negative terminal first, then the positive.

Installing the New Battery

1. Battery size: the 2010 RX350 takes a Group Size 24F. The replacement used here is an EverStart Value battery from Walmart, about $49 — noticeably cheaper than the $179-200 quoted elsewhere, with somewhat lower cranking amps than a premium battery.
2. Check the manufacture date before buying — a battery that’s been sitting on a shelf a long time won’t perform as well as one that just arrived. In this case the battery had a date sticker from the same week it was purchased.
3. Seat the battery gently with a rubber mallet — the video specifically avoids using anything metal for this.
4. Connect the positive terminal first this time (reverse of removal), watching for sparking as the connection makes contact.

The Backup Plan

Because a budget battery is a known tradeoff, this pairs it with a portable jump-starter as insurance:

• Rated around 2200 peak amps in this video.
• Charges via USB-C.
• Doubles as a basic battery tester: connected to the new battery, it read 12.4 volts, which indicates a good battery. (This is a no-load test — it won’t catch every failure mode, but it’s a useful quick check.)

The reasoning: even with the jump-starter added in, the combined cost is still well under a single premium battery purchase, and the backup covers the risk of the cheaper battery underperforming.

That’s It

Group Size 24F, roughly $49 versus $179-200 quoted elsewhere, backed by a portable jump-starter for insurance. Basic hand tools only — no shop visit required.