NOCO Boost Plus GB40 1000A UltraSafe Car Jump Starter - 12V Portable Power Bank with Jump Leads for 4.0L Gas & 3.0L Diesel Engines - Emergency Battery Booster for Cars, Trucks, SUVs & Boats - Perfect for Roadside Assistance & Outdoor Adventures

Please note: this review is based on about 1 week of ownership, so does not related to long term sturdiness or performance.Bought this after surveying all the various options and although there are some cheaper, it seemed like this combined the right capacity, additional safety features and clear design for the purpose. (Some cheaper items look like re-purposed phone battery banks, so I was sceptical how good they would be).My car battery suffered a fairly deep discharge during first covid lockdown and although usable, has never really been the same since. It's a heavy duty stop-start battery on a 2.0 Litre petrol. It's had to be charged a couple of times after standing and failing to start the car, and latterly has been showing signs of draining and failing to start the car after just a few days sitting not being used.So, i bought this as a "get of out jail" - especially if I drive somewhere and then the car won't start to come home. I've already had to use it, and I'm pleased to say that after connecting it up, waiting about 20 seconds to go round and get in the car and start it, it started first time.It would be useful if it displayed voltage when attached, then you could assess just how discharged the car battery is, but that's a minor niggle. For example, I don't know if my battery was just under 11v and the car electronics were deliberately preventing it starting, or whether it was much lower.It's really simple to use and the cables, though short, reach fine from the + terminal of the car battery to the -ve post on the engine wall - without anything dangling into the engine bay at risk of getting caught up.I was also impressed with how quickly it charged up. After receipt, and although showing empty, it only took a few hours plugged into a regular 2amp USB socket on my wall to get it fully charged. Then after starting the car a few days later, I simply plugged it into the USB in the car itself while driving and by my destination, it was fully charged up again ready to be used. (A bit "belt and braces" on my part, as after one start, the device was still showing green for the amount of charge left in it)It actually feels fairly sturdy and easy to grip and hold without slipping (more than can be said for some power bank chargers). Obviously I'm not going to deliberately drop it to see if it smashes open or not :) but it seems perfectly fit for purpose.All in all, i'm very pleased with it and the extra piece of mind it gives until I replace my car battery.