I m using this brand since last 3 years and found not sinlge problem in this one as it just value for money it is so safe to use the quality I like the most about is that it is save for all.it gives me the back up of upto 10 hour a day with two fan running on it and LED has no problem in it to run full day it just a smart package with all safety features it also tell me that when the charging needed or when it is fully charge.It also tell me about the battery percentage left in the battery I just use to change 6 month a year its water inside it just value for money for me and I happy with this one.