Battery Testing & Replacement
Heavy-duty batteries wear out, especially in Canadian winters. Testing identifies weak batteries before they strand a truck, and mobile replacement gets you moving without a tow.
- AvailabilityCalls and messages 24/7
- WhereRoadside, yard or jobsite
- CategoryHeavy-Duty Truck Repair
- On-site repairWhere feasible and safe
About battery testing & replacement.
Heavy-duty batteries wear out, especially in Canadian winters. Testing identifies weak batteries before they strand a truck, and mobile replacement gets you moving without a tow.
A mobile mechanic can look at the unit where it stands, whether that is the roadside, a yard or a jobsite. That can avoid a tow and shorten downtime when the fault is suited to on-site work.
Part of Heavy-Duty Truck Repair.
When you might need it.
Any of these is a good reason to call and describe what the unit is doing.
Slow cranking, especially in cold weather
Needing repeated jump-starts
Corroded terminals or swollen cases
Electronics resetting at start-up
What the service involves.
Load and voltage testing
Inspecting terminals, cables and grounds
Checking the alternator so a new battery isn't drained
Replacing batteries where stock is available
Causes and good habits.
These are possibilities, not a diagnosis. The only way to know is to test the unit.
Possible causes
- Age and repeated deep discharge
- Cold weather reducing available power
- Parasitic drains and charging faults
Practical tips
- Test batteries before winter
- Keep terminals clean and tight
What to expect.
Battery group sizes vary, so details of your truck help us confirm availability in advance.
On-site repair depends on the fault, parts, vehicle condition, safety and service feasibility.
(437) 601-8551Before you call
- Exact location, and direction of travel on a highway
- Truck or trailer type, make and year if known
- What happened and what warnings you see
- Whether the unit is somewhere safe
- A number we can call back
From the first call to the fix.
Call or message
Tell us where the unit is.
Describe the fault
Symptoms, lights, noises, leaks.
Agree the plan
Feasibility and dispatch, discussed honestly.
Diagnose and repair
On site where it is possible and safe.
Services that often go together.
Battery Boost & Replacement
Dead batteries are one of the most common reasons trucks stop.
Alternator Replacement
If the alternator stops charging, batteries drain and electrical systems fail.
Starter Replacement
A failed starter leaves a truck stuck even when the batteries are good.
No-Start Diagnostics
A truck that won't start can have a battery, starter, fuel, air or electrical fault.
Battery Testing & Replacement by area.
Choose your community for local information.
Frequently asked questions.
Can you replace truck batteries on site?
Often yes. Tell us the truck type and battery configuration when you call.
How do I request this service?
Call (437) 601-8551 or message us on WhatsApp with your location and the issue. For non-urgent work, use the contact form.
Can every repair be done on site?
No. It depends on the fault, parts, vehicle condition, safety and feasibility.
Stranded on the Road? Let's Talk.
Tell us where your truck or trailer is located and what happened. Contact Fellows to discuss mobile repair options and next steps.
(437) 601-8551Have ready: exact location, truck or trailer type, what happened or what warnings you see, whether the unit is somewhere safe, and a callback number. Timing, dispatch and on-site repair depend on location, availability, the fault, parts and safety.