Jump Starter Power Pack, 4000A Car Battery Booster Jump Starter for 12V Vehicle (up to 10L Gas, 8L Diesel), Portable Car Battery Charger Power Bank with Jump Leads, LED Flashlight, USB C

I purchased this and was a bit sceptical if it would start my 2l diesel with a fully flat battery.Impossible to get jump leads to it where it failed.I charged it to 100% and went to the car battery.I followed the book and pressed the pulse/start button to add some charge as there was nothing left in the battery. Light was flashing and it went green. I tried the car but it did not start. Went back to it and the light was red.I removed leads and retried again with the button and tried starting. Nothing.After a few attempts it seemed that once the light went green I tried straight away rather than wait.Lights came on and it started in a couple of seconds. I was blown away as I was on the verge of giving up. The device was down to 49% but it worked. On that front I am pretty impressed and glad I did not waste my money!I will charge it up and keep it in the back now I know it works.

Amazing product compact fits anywhere.

Although I have not had cause to use the device yet, I have viewed a few videos which show cars starting from totally dead batteries and also in winter conditions without any problems.I would like to mention that care should be taken when replacing the device into the case provided because when I received the item, I checked everything, read the booklet and then packed the device back into the case. However, when I was showing the device to a pal about 10 days later, I noticed that the charge level had fallen from 72% to 1%. This was because the light had been turned on when I zipped the case up because of pressure on the on switch. The light had been strobing for 10 days. Pretty impressive but annoying. I realised that if the item is packed a certain way, it is possible for a jump clip to apply pressure on the switch.So, in order to avoid this, it is necessary to pack the item as follows. The case has a cut-out section where the 'glass hammer' part fits, so make sure that the jump starter is positioned correctly. Then when you pack the jump cables, make sure that they are packed one behind the other so that the black cable lies within the 'V' of the red cable and the point of the V's point in the direction of the cut-out (See photo). This allows there to be a gap where the start switch will not be pressed by the black jump clip. It is worth zipping the case and then reopening it just to make sure that the unit has not been turned on. It would be helpful if this instruction was in the accompanying booklet with a diagram to assist with positioning.Incidentally, I charged the unit to 100% and it still shows this charge after being left for 13 days.

Had a small problem initially. I contacted the seller, resolved straight away. Big thumbs up!Used once worked perfectly, went from 100% to 92%. So plenty of ooomph left

Arrived boxed and undamaged. 70% charge, didn't take long to fully charge.Connection phone and it immediately started charging, the led indicated output via usb.Nice sturdy housing and complete with a storage holder with necessary cables included.Brought as a back up after the last battery die over winter so unable to test it out, just hope it's as good as it says when I do need it 🤞

Phone and my car 🚗

I bought two of these in November 2023, however the second unit wouldn't charge so it was returned for a refund. I used this twice on a 1.3 Yaris in November / December 2023 and it was great as it started the car straight away, no fuss. A couple months ago (August / September 2024) I tried the same car again and it wouldn't start the car despite being fully charged. After a couple of attempts and with the battery now reading 87% full I put the charger on overnight charge but this made no difference to the % charged. As this item is still under guarantee I got in touch with the Manufacturers who after giving me the runaround suggested the charging lead I was using was faulty. I did manage to charge my mobile phone which took this down to 79%. I further tried a couple of different charging leads and still no joy in increasing the % charged on the unit. I've got back to Acmount twice now and both times they've promised to send me a new lead (rather than a new unit) if I provided my order details (provided twice by chat) which I have and have heard nothing further from them. This is a real shame as the unit is light and easy to handle (unlike the bulkier chargers), however if it stops working within the guarantee period (it won't start my 1.3 Yaris, I have plenty of 'phone chargers) and the manufacturers don't honour their guarantee then it's a waste of money. Mine is now in the bin and I'm back to using my huge bulky Clarke Charger which I've had for a while now, if only it's wasn't so heavy! Regarding the Acmount mine didn't last 12 months so was a waste of money for me.

Bought this after finding my car battery completely flat. Haven't had a need to use it yet but seems a well made bit of kit.