YESPER Boost Jump Starter Battery Pack 4120A 27000mAh Car Battery Charger Jumper Starter (All Gas/up to 10L Diesel) 100W Quick Charge 12V Portable Jump Box for Totally Dead Vehicle with DSLI Safe Tech

I have a Chevy Suburban, don't drive sometimes for up to a week. twice now I've left things pugged in and ran the battery flat dead (had to unlock with key) This thing started it instantly both times. Also good to hook to small engines electric starter instead of buying batteries, works like a charm

This device will ONLY charge with a POWER MODULE that outputs to the providedUSB-C double ended cable.See my photos.Mine charged from 75% to 100% in less than an hour.There’s a super expensive YesPer 200 watt power supply, but it will drain your wallet. This 20 watt CA-43T off brand module which I have for iPhone works fine.

This will not be a problem for most user unless they need to replace cable or add an adapter. Almost all other jump packs use an EC 5 or have adapters available to be able to convert their plug to EC5. Cables are on the short side and I wanted to be able to use short EC 5 extension and I have SAE connector wired directly to my batteries to charge them and wanted to be able to use an EC 5 to SAE to jump the battery since it is the floor of my trunk.I am not sure what type is used on the Fast Max but it is not compatible with EC 5 or EC 3 and I can not find any adapter that fit.The jump pack seem to work well and charges devices and accepts recharging and holds it charge

I work as a mechanic so I need to jump start cars alot. It has jumped everything I've tried it on and battery life is pretty good jumped 3 or 4 cars and only dropped 10 to 15%

Haven't hat to use it but It does look well made and sturdy too.