San Antonio, TX · Open Shop

Engineered
Reconditioning.
Not guesswork.

Rhino Battery rebuilds Toyota Prius and Lexus hybrid packs the right way — every NiMH module individually cycled, capacity-matched, and logged to a datasheet you get to keep. No shortcut swaps. No mystery cells. No coming back in six months.

Call for a Quote See What We Do
28
Modules per Gen 2 Pack
2.00V
Gen 3 Spread Target
12mo
Workmanship Warranty
What We Do

Two things.
Done right.

We don't do oil changes. We don't do tires. Every hour in the shop goes into hybrid NiMH work — which is how we do it better than a general repair shop can.

PRIMARY SERVICE

Prius Gen 2 & Gen 3 Reconditioning

Your pack gets stripped to bare modules. Each NiMH prismatic is cycled on our custom bench, capacity-matched into tight pairs, and reassembled with fresh busbars, torque-spec terminals, and a clean thermal path.

  • Individual per-module cycling — no "test the pack and hope"
  • Voltage-deviation pairing for matched thermal behavior
  • New busbar copper & torque-checked terminals
  • Printed diagnostic report delivered with every pack
  • 12-month workmanship warranty
PLATFORMS: PRIUS · PRIUS V · LEXUS CT200H TURN: 3–5 DAYS
DIAGNOSTICS

Diagnostic & Pre-Purchase Testing

Buying a used Prius? Debating whether a pack is worth saving? Bring it in. We pull live module-level data — not just the dash warning light — and tell you straight whether it's reconditioning-worthy, needs cells replaced, or isn't worth the money.

  • Per-module voltage & internal resistance snapshot
  • Pack-level load test under real vehicle-current draw
  • Written report with pass/fail and cost-to-fix estimate
  • Honest "walk away" advice when the pack isn't worth it
  • Test fee credited toward reconditioning if you move forward
TYPICAL: 45–90 MIN APPOINTMENT REQUIRED
Why Rhino

Built by the same person
who rebuilds your pack.

The diagnostic equipment in our shop isn't bought off Amazon. We built it. That's why our work is repeatable — and why we can back it.

01 / PROCESS

Proprietary Cycling Rigs

Up to 42 modules tested simultaneously on ESP32-based rigs we designed and maintain in-house. Consistent test conditions, consistent results.

02 / EVIDENCE

Every Cycle Logged

Voltage and current are sampled continuously through charge and discharge, saved to SD, and exported to CSV. You see the data your pack passed — not just a sticker.

03 / HONESTY

We'll Tell You No

Some packs shouldn't be reconditioned. When the math doesn't work in your favor, we'll say so and point you at a better option. That's cheaper for everyone in the long run.

How It Works

Drop off Monday,
drive it Friday.

Most reconditioning jobs turn in 3 to 5 business days. Here's what happens between you handing over the keys and getting them back.

01

Intake & Scan

We pull codes from the Battery ECU, log baseline voltage across all modules, and confirm the pack is a candidate for reconditioning before anything else happens.

Day 1 · 1 hr
02

Tear-Down & Cycle

Pack comes apart. Every module goes onto the bench for a full charge-discharge-charge cycle. Weak cells, high-resistance modules, and thermal problem children get flagged in real time.

Days 2–3 · 36–48 hr
03

Pair & Rebuild

Modules are paired by duration-matched capacity, not just voltage, and arranged center-out for thermal balance. Busbars cleaned or replaced. Terminals torqued to spec. Nothing goes back in by feel.

Day 4 · 4 hr
04

Verify & Hand Back

Full-pack load test, final scan, and your printed diagnostic report. You get the keys, the paperwork, and a 12-month warranty on our work.

Day 5 · 1 hr

Got a dying pack?
Let's talk.

Easiest way to start is a phone call — we'll walk through your symptoms, your vehicle, and whether you're a candidate for reconditioning or full diagnostic.

(210) 617-3137
Serving San Antonio & South Texas
Hours
Mon–Fri · 9:00 AM – 6:00 PM
Sat · By Appointment
Sun · Closed
Specialty
Toyota & Lexus Hybrid
NiMH prismatic pack experts