Mobile van jumpstart · Battery keeps going flat
Repeat Flat Batteries — Solihull van jumpstart & Diagnosis
Flat again in Solihull? We measure quiescent current and alternator output before selling anyone another battery. Mobile Van Jumpstart, 24/7.
A healthy vehicle should draw around 20–50 milliamps once everything has gone to sleep. A faulty module, an aftermarket alarm or a stuck relay can pull ten times that, which flattens a good battery in two or three days.
If your work van is stone dead around Solihull, don't book recovery yet. Most van no-starts near the M42 J4/J5 corridor are cured with a mobile jump and a proper alternator/battery health check on the driveway.
Diesel vans need real cranking amps — a jump pack designed for cars won't spin a 2.0 or 2.2 diesel that's been standing cold. Our kit is spec'd for commercials.
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.
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.
- Alternator output tested at idle and at 2000 rpm before we leave, so we know the recharge will actually work
- On a van jumpstart the equipment is matched to the vehicle — cranking current, terminal layout and battery location all change the approach.
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).
Repeat flat battery questions
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.
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.My van cranks slowly then dies — is that the battery?
Usually yes, but sometimes it's the starter drawing too much current or a bad earth. We test all three on the driveway before recommending a replacement.
Q.What if the van battery keeps going flat every week?
That's parasitic drain — usually a dashcam, tracker or aftermarket electrics wired to permanent live. We do a milliamp draw test and identify the circuit.
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.
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.
How the visit runs
- 1
Phone diagnosis
Van make, model, engine size and symptom — we already know if it's a battery, alternator or starter pattern.
- 2
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.
- 3
Fixed quote
Price agreed before we set off. Includes callout, jumpstart and full electrical health check.
- 4
On-site test
Voltage, load, alternator output at 2000 rpm, parasitic draw. Real numbers, not guesses.
Flat again?
Third battery in two years is a diagnosis problem. We measure the draw and the charging output before anything is replaced. Van Jumpstart covers interwar detached houses and executive new-builds and trade vehicles alike, all from the same van.
Where we test
Solihull sits about 8 miles from Birmingham, and the same van covers Shirley (~2 mi), Olton (~2 mi) and Knowle (~4 mi) on the same run.
Why this is safe to book
- Findings are written down with the actual current draw in milliamps, so any follow-up work starts from evidence.
- Fixed prices agreed before dispatch — no callout fee just to open the bonnet in B90.
Related pages
- Battery Replacement — battery keeps going flat in Solihull
- Car Jumpstart — battery keeps going flat in Solihull
- Jump leads didn't work — van jumpstart in Solihull
- Workplace and staff parking — van jumpstart in Solihull
- Car won't start, no click — van 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 Knowle
- Van 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. Either way you get the readings, the reasoning and a working vehicle before we leave.
Stranded with a flat battery?
Call now or send a WhatsApp — we'll confirm your quote and dispatch the nearest engineer.