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I was sick of rechargeable jump packs being flat when I needed them, so I purchased this Ultra Capacitor jump starter. It really works as expected, so no more drama with flat rechargeable packs. The positive lead is a fraction short to be securely clipped into the carrying case elastic retainer. The carrying case zips are hard to start after being placed in the fully opened position. Other than that the build quality looks great. It did take ages to charge the internal battery to 100% using the USB adaptor.
Verified purchase: Yes | Condition: New
Nicely made unit, but be aware that the useable battery capacity is no where near 20800mah. After doing numerous battery capacity tests, it is more like 12000mah at most. If it did have a 20800mah battery it would be twice the weight and size (just look up the size and weight of a 20000mah 4S lipo battery). I also seriously doubt it could produce 2000A. Given its actual capacity the battery would have to a discharge pulse rating of 166C. I wish companies would stop lying about their battery pack capacities.
Verified purchase: Yes | Condition: New
I bought this power bank to power my Skywatcher 10" Dobsonian telescope. I was skeptical at the time of purchase but when fully charged and connected, it can power the telescope motors for about 8 hours. Size is handy and compact and not that heavy for a battery pack.
Verified purchase: Yes | Condition: New
I have bought several jump packs off the internet over the years and they get a heard life so I refused to buy an expensive one. I work for a very reputable company and this model from TopDon appears as good as quality but 1/6th the price. I hope it performs as good as its appearance and build quality
Verified purchase: Yes | Condition: New
Even as just a power bank this thing is very well featured, but it also does a great job of jump starting a low battery
Verified purchase: Yes | Condition: New