Hello friends, If u can help me

I am newcomer in rc recently i purchased Emax combo from rcdhamaka and battery, charger,  servos and tx rx from Sai, the battery is 850 mah 3s, when i charged it first time with b3 pro charger it took almost 1 hour, than i used the battery on testing purpose and evern after 10 mints use i did not find cutoff point means the motor still was spinning fast at half throttel than i stoped testing and next day i charged the battery again but this time it took 1.5 hour, so i asked to mr Sai and told me that if i discharge more then it would take more time to charge. so my question is that if Esc has cutoff setting then can we discharge battery beyoud the limit? please help me   

Depends what ESC you have.. Most of the mid range to high range ESC (price wise) have programming feature where in you can change the setting like Batt type, cutt off, timing, start type etc using the Tx (while the ESC is connected to the Rx) or using dedicated Programming card. Please try to download the manual of ESC from Net if you can figure out the brand/model or Ask Sai.

Emax combo from RCD... so RCD can help you get the ESC details/manual.  Also, you should do test runs with the prop mounted.

The behavior you are seeing could just be because lipos are shipped at storage charge (which is about half charge), and the second time you are charging from a lower charge level.  So it took less time the first time around.

ESCs come with some level of cut-off as the default (typically 3v per cell).