Battery Testing, Diagnostics & Replacement – Townsville
We test, diagnose and replace batteries across automotive, marine and deep-cycle applications. Unsure if your battery is failing or there’s a charging issue? Our technicians pinpoint the cause quickly with digital and load testing — so you only replace when necessary.
Accurate Battery Testing & Diagnostics
We use advanced CCA analyzers and load testers to assess true battery health, alternator output, starter draw and parasitic drain. AGM, flooded, EFB and Lithium supported.
- Real results: CCA, state of health, internal resistance
- Charging checks: Alternator/regulator output & ripple
- Draw tests: Starter current and parasitic drain
- Reporting: Clear recommendations for replace/retain
Battery Ranges We Test & Supply
Our Testing Services
Fast, accurate and reliable testing for cars, 4WDs, marine and deep-cycle systems — in-store or mobile.
Digital CCA & Health Test
Non-invasive test for CCA, voltage and internal resistance to gauge true battery condition.
Load Testing (Where Applicable)
Confirms performance under load for borderline results or deep-cycle packs.
Alternator & Starter Checks
We verify charge voltage, ripple and starter draw to rule out system faults.
Parasitic Drain Testing
Finds hidden drains that flatten batteries overnight or during storage.
Chemistry-Correct Replacement
TWB Silver & Gold, Marshall and specialty lines — matched to the vehicle and usage.
Fitment & Recycling
Clean installation with memory-safe procedures and old battery recycling.
Why Choose Townsville Wholesale Batteries?
Local, Fast, Friendly
Walk-in testing or mobile help across Townsville & surrounds.
Only Replace When Needed
Clear results and honest advice — keep a good battery, replace a bad one.
Stock On Hand
TWB Silver & Gold Series, Marshall and specialty batteries ready to go.
Correct Spec, Every Time
Stop-start, AGM, EFB, deep-cycle or lithium — we match the right spec to the vehicle.
Warranty & Support
Manufacturer warranty plus our workmanship guarantee.
What We Check & Verify
CCA & State of Health
Quantifies cranking ability and internal condition for clear keep/replace decisions.
Charge Voltage & Ripple
Alternator/regulator checks to protect new batteries from over/undercharge.
Starter Current Draw
Identifies high-draw issues that mimic a failing battery.
Parasitic Drain
Tracks stealth loads that flatten batteries during storage or overnight.
Battery Registration (Where Needed)
Stop-start vehicles may require BMS reset/registration after replacement.
Deep-Cycle Health
Capacity checks for AGM/lithium house batteries, charge profiles and solar input.
Book Your Battery Test
Free testing • Same-day help • Local technicians • TWB Silver & Gold • Marshall