Battery Testing, Diagnostics & Replacement – Townsville
Fast, accurate diagnostics for automotive, 4WD, marine and deep-cycle systems. Not sure if it’s the battery, alternator or a hidden drain? Our technicians use calibrated digital analysis and load testing to pinpoint the fault — so you only replace when it’s truly necessary. We stock premium ranges including TWB Silver & Gold, Marshall and our #1 most reliable and trusted brand: Amaron.
Accurate Battery Testing & Diagnostics
We use professional CCA analysers, ripple meters and load testers to assess true battery health, alternator output, starter draw and parasitic drain across AGM, flooded, EFB and LiFePOâ‚„ chemistries.
- Real results: CCA, State of Health (SOH), internal resistance and open-circuit voltage
- Charging checks: Alternator/regulator voltage and AC ripple to protect sensitive electronics
- Draw tests: Starter current profiling and parasitic drain isolation
- Clear reporting: Keep/replace guidance with correct-spec recommendations
When replacement is required, we fit the right battery for the job — with Amaron as our #1 recommendation for durability and long life in North Queensland conditions.
Battery Ranges We Test & Supply (Amaron #1 Recommended)
Our Testing Services
Precision testing for cars, 4WDs, boats and deep-cycle house banks — available in-store or via our mobile service. Transparent results, premium components and workmanship you can trust.
Digital CCA & Health Test
Non-invasive analysis of CCA, SOH, internal resistance and OCV to reveal true condition — beyond a simple voltage check.
Load Testing (Where Applicable)
Verifies performance under controlled load for borderline results or deep-cycle packs.
Alternator & Starter Checks
We confirm charge voltage, AC ripple and starter current draw to rule out system faults before replacing a battery.
Parasitic Drain Testing
Hunts down stealth loads that flatten batteries overnight or during storage — with circuit-by-circuit isolation.
Chemistry-Correct Replacement
Amaron (#1 recommended), TWB Silver & Gold, Marshall and specialty lines — correctly specified for stop-start, AGM, EFB, deep-cycle or lithium.
Fitment & Recycling
Clean installation with memory-safe procedures, BMS/IBS awareness and responsible recycling of your old battery.
Why Choose Townsville Wholesale Batteries?
Local, Fast, Friendly
Walk-in testing or mobile service across Townsville & surrounds — same-day help available.
Only Replace When Needed
We show you the data and explain the result — keep a good battery, replace a bad one. No guesswork.
Stock On Hand
Extensive range including our #1 Amaron, plus TWB Silver & Gold and Marshall — ready to install.
Correct Spec, Every Time
Stop-start, AGM, EFB, lithium or deep-cycle — we supply the right capacity, CCA and terminal layout for your vehicle or vessel.
Warranty & Support
Strong manufacturer warranty backed by our workmanship guarantee and after-sales support.
What We Check & Verify
CCA & State of Health
Confirms cranking ability and internal condition for confident keep/replace decisions.
Charge Voltage & Ripple
Alternator/regulator checks (including AC ripple) to ensure stable charging and protect on-board electronics.
Starter Current Draw
Identifies high-draw and slow-crank issues that mimic a flat or failing battery.
Parasitic Drain
Measures and isolates stealth loads that discharge batteries during storage or overnight.
Battery Registration (Where Needed)
Stop-start and smart-charging vehicles may require BMS/IBS reset and registration after replacement.
Deep-Cycle Health
Capacity checks and charge-profile verification for AGM/LiFePOâ‚„ house batteries, including solar input and DC-DC integration.
Book Your Battery Test
Free testing • Same-day help • Local technicians • Amaron #1 • TWB Silver & Gold • Marshall