Tinyfish K12 Multi-Function Power Supply and Jump Starter with 13800mAh 4USB Power Bank Emergency Car Battery Booster Pack Vehicle Jump Starter Charger SOS Flashlight

i cannot really write a review based on the products ability to jump start my vehicle bc i have bot had to use that feature yet but usb charger works and flash light features. and 3 stars is only bc i have now purchased 6 different brands of these portable multi function jump starters and 3 of them after a few months of only using the junp start function once mostly just used the portable charging function for my cell or a portable blu tooth speaker or ipad and or samsung tablet. then 1 day i went to use it after not for over 2 weeks and saw the lithium battery had expanded expanding /casing it was enclosed in was cracked apart day and it was already charged and not on the charger and once a battery starts to do that it is done and as soon as mine reach a full charge i remove them from charger...so i have purchased 3 of 6 on amazon (not this brand thought until now ) that lasted maybe 6-9 months and all that malfunctioned exact same issue 1 i purchased for a friend as a gift but she lost it and 1 i still have and have had for over 2 years and has been used 4 x to jump different vehicles also a motorcycle and a jet ski. so hopefully this one will last...the ones that did not cost $80-100.

First of all, the product was missing the user manual. Within 3 months after recharging it a few times, the on/off button doesn't turn on the device. So no longer can turn on the lights or use the USB ports. Not sure if it holds any charge since the battery level indicator light doesn't work now. There is no warranty as well.

Bought one for my husband and one for my husband, everyone is very satisfied

Very satisfied. Let's of connection for other devices.

Excellent. Jumped old dead battery. Holds charge for the 3 months in not longer. It charges phones fast. Itself charges fast. A must have for your trunk. Help yourself, friends, and strangers.

I love the multi functionality the best! I can use it as a power bank, flashlight and jump starter. I haven't used all the functions yet but so far so good. I look forward to making full use of it.

It makes boosting the Harley easy

great product