Electric Vehicle
EV Battery Health Check
Professional battery diagnostics for electric and hybrid vehicles. Get a full State-of-Health report, understand your true range, and catch cell degradation before it becomes a costly repair.
BEV & PHEV
All EV & Hybrid Types
~25 min
Full Diagnostic
SoH Report
Written Health Certificate
Same Day
Results & Advice
What we test
Full EV Battery Diagnostic
- State of Health (SoH) percentage reading
- Full cell voltage balance & deviation analysis
- Battery Management System (BMS) fault code scan
- Charge & discharge cycle history review
- Thermal management system inspection
- Onboard charger & charging port function test
- 12V auxiliary battery condition check
- Written health report with pass / advisory / replace recommendation
Warning signs
When to Book an EV Battery Check
Range dropping below expected
Your EV is covering significantly fewer miles per charge than the manufacturer's stated range — a clear sign of battery degradation.
Charging won't reach 100%
The battery cuts off early or shows inconsistent charge levels, pointing to cell imbalance or a BMS fault.
Battery or BMS warning light
Any battery-related warning on your dashboard needs immediate professional diagnosis to prevent further damage.
Longer charge times than usual
Taking noticeably longer to charge to the same level suggests cell degradation or a fault in the charging system.
Common questions
Frequently Asked Questions
How do I know if my EV battery is degrading?
EV batteries degrade slowly — typically 2–3% per year under normal UK driving conditions. Signs include reduced range, longer charge times, and the battery not reaching 100%. Our State-of-Health test gives you an accurate percentage reading so you know exactly where you stand.
Will a battery health check affect my manufacturer warranty?
No. Our diagnostic is entirely non-invasive — we read data from the Battery Management System (BMS) without opening the battery pack. This does not void any manufacturer or battery warranty.
How long does an EV battery health check take?
Most checks take around 30–45 minutes. We connect specialist diagnostic equipment to the BMS, run a full cell analysis, and produce a written health report before you leave.
Do you check hybrid (HEV/PHEV) batteries too?
Yes — we test both full battery electric vehicles (BEVs) and hybrid battery packs. Just let us know your vehicle type when booking and we'll ensure the right equipment is ready.
Can you recondition or replace an EV battery?
For batteries showing moderate degradation, cell rebalancing can restore some capacity. For severely degraded packs, we can advise on replacement options and source compatible units for most makes and models sold in the UK.
Don't guess your range
Book Your EV Battery Check Today
235 Yeading Ln, Hayes, UB4 9AD — walk-ins welcome or book online for a guaranteed slot.