Hmm. An Ic in the cable. Explain what the ic does. Does it stepdown the voltage to 18.5

A laptop power bank. Zinox laptop power bank. I have wanted to get a bigger battery to fix up my exiting inverter system then I came abouot this laptop power banks. This is the first product I have bought in my life without doing a review. It blew my super IC on my lovely elitebook laptop. Although, I have fixed my laptop and even using it tonight I decided never to use that bank with the HP again. This power bank power my other system anyway and so I dont feel like i lost all. I am only pained for the stress and money it cost me to my laptop twice in less than 10 days. I blame this occurrence partially on my die hard problem solving skills.

[center]Hello nairalanders. I have been an avid reader of this forum since 2010. This is my first post, I do wish it makes front page. I'm a web programmers and an IT guy in general. I love working on my laptop and i hate it when PHCN dictate how long i should work. My solution, I needed a deep cycle battery of at least a 40AH to connect to my 500Watt inverter.

A good truly rated 40ah battery cost around 20-23k. I knew of these laptop power bank that can be bought for about 10k and they can provide power for a long period depending on your system usage and present application you are working on. Above all, this power bank can be taken to any barber shop and recharged saving more on petrol cost. My thought. Guys, weighing the two options, I decided to go for this power bank because it was cheaper and mobile. But I was wrong.

I use three systems, An Hp Elitebook 6930p, a dell mini laptop and a sleek Fujitsu 14.1 laptop. I purchase the battery bank then went home tried charging and its worked on the mini and Fujistu which were both 19Volts. At first attempt plugging into the HP. Charging light shows but battery never increases. Conclusion after hours of research some HP and Dell will never charge with non OEM chargers. It might be able to power but will not charge because HP and DELL built a sensor into its charger to communicate with the laptop if it's the original charger that is plugged in. To cut short my writing, after a few attempt at plugging into the Hp from the bank, It damage the SMSC chip (Power/Switching IC).
I have an opinion that perhaps if i had just power directly, without the battery in, the damage would not have occurred.

This same bank charges my dell mini which uses acer mouth or connector . (dell mini 1018). It also powers my Fujitsu. So i wasn't too angry at least it can work with two of my device.

My conclusion guys, these power bank don't support all laptop as those sellers claim. If you check some review online, in a site it was started clearly that it doesn't support HP 15 laptop. It is better on 19 Volts laptop with amp lower than 3.5. Any laptop with greater amperes might not get charged with this bank but might just be able to provide power.

My good friends, if you intend buying any of these devices, kindly know your system specification. Never use this on a system lower than 19Volts. At school, I did digital electronics and I know there is a tolerance of + or - 0.5 but here is the catch, some system board once the manufactures have set their input rating, that is the highest it can handle.

My one cent always stay withing your volt requirement. Don't believe some seller that would say it power all laptop. I have read about cases with Toshiba laptop also. Work withing your system specifications.

Bro please dm me the process of the USA masters stuff. You can mail me via johnbright197@gmail.com.

I studied computer science and i'm thinking of something similar at Germany.