Mobile Battery Replacement
Car battery replacement where you're parked: new battery delivered and installed on the spot — standard, AGM, H6, H7, and H8 sizes.

Booster Pack · Tested Before You Go
A car that clicks, cranks slow, or does nothing at all at a Washtenaw County curb, campus lot, or parking structure. We jump it from a professional booster pack, check whether the charge holds and the alternator is doing its job, and tell you straight whether you are driving away or need a battery.
What's included
Turn the key once and listen. Fast clicking while the dash lights dim is a battery that cannot push the starter. A slow, dragging crank on a cold morning is a battery on its last legs, made worse by thick oil. One loud click with the lights staying bright points at the starter or its solenoid, and no jump fixes that. An engine that catches and then stalls before you reach the road was running on the battery alone because the alternator quit. No lights or chime at all means a flat battery or a corroded terminal.
Push-button cars add one wrinkle: with a dead battery the fob never wakes the car and the screen stays black, but the fix is the same jump. Tell dispatch what you heard and what the dash did. That answer decides whether we send a booster pack or the right tow truck for your vehicle, and you get an honest ETA and a confirmed flat fee before any truck moves. Dispatch is at 734-985-0010.
We do not walk up with jumper cables and look for a volunteer. The truck carries a professional booster pack sized for cars, SUVs, and light trucks. No second vehicle is in the circuit, so a reversed clamp cannot take out a module in anyone's car, and the current is steady rather than whatever an idling engine can spare.
The pack is portable. Nosed in against a wall on an upper level of a downtown Ann Arbor structure, the truck stays at the entrance and the driver walks up. Cars that hide the battery in the trunk or under the rear seat almost always have a remote positive post under the hood for exactly this, and our drivers know where to find it.
Getting the engine to catch is the easy half. Before the driver leaves, the car has to prove it can run on its own.
Then you get a plain answer. Drive it, but get the battery tested this week. Replace the battery now. Or leave it, because the alternator is done and a tow to your shop costs less than a second breakdown on US-23.
A battery that takes the jump but will not restart the car on its own, a case swollen or crusted white at the terminals, or a battery on its second jump this month is finished. The same truck can install a new one on the spot. We carry Standard, AGM, H6, H7, and H8 sizes.
Cars with push-button start and automatic stop-start usually call for an AGM battery. A standard flooded battery in one of those cars dies early and can trip warnings, so dispatch matches the battery to your year, make, and model on the phone. Dispatch confirms the price of a mobile battery install before the truck is sent. We do not bill insurance directly; the job is paid at the car, and the itemized receipt is yours to submit.
The first hard freeze of the year fills the board. A battery that was marginal in October loses much of its cranking power on a bitter morning while cold oil makes the engine harder to turn. Driveways in Saline, Dexter, and Chelsea call before sunrise.
Long sits are the other steady source. Campus lots in Ann Arbor and Ypsilanti after a semester or a break. Long-term and park-and-ride lots after a trip. The second car in an apartment lot off Carpenter Road, or off Ford Road in Canton, that has not turned over in a month. The car that started at home and will not restart at a gas station off I-94 had exactly one start in it.
Hybrids and EVs land on the board the same way. The small 12-volt battery that wakes the car dies like any other, and until it gets a jump the car sits dark with a full traction pack. If the fob would not open the door either, lockout assistance comes on the same visit.
Find your hood release before we arrive. On most cars it is a lever near the driver's left knee; some put it in the glovebox or behind the grille, and nearly all need a second pull at the safety latch under the hood lip. Have the key or fob in hand. If the fob cannot unlock a dead car, most fobs hide a mechanical key blade, and most driver doors hide a keyhole under a cap on the handle.
Give dispatch the structure level and a pillar number, or the building and lot section. Switch off headlights, wipers, radio, and the heater fan so the pack's current goes to the starter. Stop cranking. Every failed attempt heats the starter and pulls down what the battery has left. Once the car is running and has passed the checks, drive it. Idling in the lot puts almost nothing back.
Questions
Not when it is done at the right points. Every hybrid and EV has a small 12-volt battery that boots the computers and closes the contactors on the high-voltage pack. When that little battery dies, the car does nothing, even with a full traction pack. We connect the booster pack to the manufacturer's designated 12-volt jump terminals under the hood and never touch the orange high-voltage cabling. Give dispatch the year and model so the driver knows where those terminals are before the hood comes up.
Either the alternator is not charging or the battery is too far gone to hold a charge. A jump puts in just enough to turn the starter; the alternator has to carry everything after that. That is why we read charging voltage with the engine running and load it with headlights and blower before leaving. Low voltage under load means a tow to the shop is the right call. Good voltage with a battery that will not restart on its own means a new battery, installed in the lot.
Usually not, if it was healthy going in. A parked car still draws a small current for the alarm, key receiver, and computers, and a few weeks of that in a cold lot pulls a battery below cranking strength. Tell dispatch the lot, level, and row and the driver walks the booster pack to your car. If it takes the jump and holds charging voltage, drive it a good while before shutting it off. If it will not hold, we can install a battery right there.
You can, and plenty of drivers do. The risk is the order of the clamps and what they touch. A reversed connection or a clamp that slips onto a bracket can blow fuses or damage a control module in either car, and that repair costs far more than a roadside call. A booster pack keeps a second vehicle out of the circuit and delivers steady current. We also load-test afterward and tell you whether the car will make it home, which a stranger with cables will not.
Related
Car battery replacement where you're parked: new battery delivered and installed on the spot — standard, AGM, H6, H7, and H8 sizes.
Cars, SUVs, pickups, and vans — local or across the county, priced before the truck rolls.
Keys locked inside? Non-destructive entry for most cars, trucks, and SUVs.
Where we go
Dispatched from Ypsilanti. Tap a city to see what a jump-start call looks like there.
Stuck right now?
Tell us where you are, what you drive, and what happened. We answer in English, Arabic, Spanish, German, and Romanian.