Mobile car jumpstart · Battery keeps going flat
Battery Keeps Going Flat in Solihull? Drain Testing & Car Jumpstart
Flat again in Solihull? We measure quiescent current and alternator output before selling anyone another battery. Mobile Car Jumpstart, 24/7.
Buying a second battery for the same car in a year is the clearest sign the first one was never the problem. Something is either draining charge while the car sleeps, or failing to put it back while the car runs.
Around Solihull we jumpstart cars every day — from tiny Fiat 500s outside terraces on B90, up to big Range Rovers and BMW X5s with dual AGM setups.
Cars in Solihull get a lot of school-run and short-hop use, and that's the number-one killer of car batteries — the alternator never gets long enough to fully replace what the starter took out.
Local reference data — Solihull
- Main routes
- M42 J4/J5 · A34 Stratford Road · A45
- Area type
- Town / district hub
- Postcode districts
- B90, B91, B92, B93, B94
- Reference point
- Touchwood shopping centre
- Nearest major town
- Birmingham (~8 miles)
- Typical property
- interwar detached houses and executive new-builds
Usage patterns that flatten good batteries
Cars left standing on interwar detached houses for a week or more between uses are the other common case in B90.
Locally that means Solihull itself plus the neighbourhoods that feed into it, with access via M42 J4/J5 and A34 Stratford Road and a practical radius reaching Shirley (~2 mi) and Olton (~2 mi).
How a drain is actually traced
- Quiescent draw is measured after the vehicle's modules have gone to sleep, which can take 20–40 minutes — measuring too early gives a false high reading.
- Charge acceptance is tested, because a sulphated battery can read 12.6V and still hold almost no usable energy.
- Honest advice — if it's actually the starter motor, alternator or a parasitic drain, we tell you straight
- Every car jumpstart finishes with a charging-system reading, so the same fault does not reappear next week.
Who this page is for
Owners in Solihull on their second or third battery for the same vehicle.
Domestically, interwar detached houses and executive new-builds dominate around here, which shapes how these jobs are accessed and worked.
Why this is safe to book
- We will not sell a battery to a car whose battery is not the fault.
- Fully insured for work on driveways, business premises and private car parks across Solihull Metropolitan Borough Council.
Drain faults found nearby
Recent job nearby: a car in Solihull on its third battery in two years. Drain measured at 480mA, traced to a boot latch microswitch keeping a module awake.
Recent job nearby: a vehicle off M42 J4/J5 flattening weekly. Alternator produced 13.1V under load — replaced the charging fault, kept the original battery.
Where we test
Working out from B90, the practical radius for a car jumpstart takes in Shirley, Olton, Knowle and Dorridge — all within a few minutes of M42 J4/J5.
Stop buying batteries. Find the drain.
Proper quiescent current testing in Solihull, with the offending circuit identified rather than guessed. Tell us the vehicle and the symptom and you will get a firm price before anyone sets off.
Repeat flat battery questions
Q.Could short journeys alone be the cause?
Yes, and it is more common than people expect. If that is what the readings show, the fix is a conditioning charge and a change in usage, not another battery.
Q.Do you cover Solihull and the B90 area for this?
Yes. Solihull is inside our routine coverage from Oldbury via M42 J4/J5, roughly 8 miles from Birmingham. We also cover the surrounding neighbourhoods on the same run.
Q.How long should I drive after a jumpstart?
Ideally 30–45 minutes of continuous driving, not stop-start town use. But if the battery is old and the alternator can't get it above 12.6V at rest, it'll go flat again in days.
Q.Will jumpstarting damage my car's electronics?
Not with a proper lithium pack. The old risk with jump leads and a running donor car was voltage spikes — modern lithium packs are regulated and safe on any car including hybrids.
Q.Is a parasitic drain always an electrical fault?
No. Sometimes it is an aftermarket dashcam, tracker or alarm wired to a permanent live. Those are the easy wins and we find them first.
Q.How long does drain testing take?
Allow around an hour. Most of that is waiting for the vehicle's modules to sleep — rushing it produces a meaningless number.
Related pages
- Battery Replacement — battery keeps going flat in Solihull
- Van Jumpstart — battery keeps going flat in Solihull
- Workplace and staff parking — car jumpstart in Solihull
- Motorhome and leisure vehicles — car jumpstart in Solihull
- Keyless entry and immobiliser issues — car jumpstart in Solihull
- Battery keeps going flat in Shirley (~2 mi)
- Battery keeps going flat in Olton (~2 mi)
- Battery keeps going flat in Knowle (~4 mi)
- Battery keeps going flat in Dorridge
- Car Jumpstart in Solihull — main page
- All jumpstart services in Solihull
The short version
A battery that keeps dying is telling you about the car, not about itself. Measure the sleep draw and the charging voltage in Solihull and the real fault usually appears within the hour. If you would rather plan it than react to it, a car jumpstart can be booked for a time that suits.
Stranded with a flat battery?
Call now or send a WhatsApp — we'll confirm your quote and dispatch the nearest engineer.