[DeWalt DEWALT DCF899HN-XJ 18V LI-ION XR CORDLESS WILL BE USING 18V 1.3AH LI-ION ON IT NEED ADVISE THANKS]

hi will the charger i got charger  5 ah or 4 Ah ok or will they just take longer ?????as its not the correct charger 

[DeWalt DEWALT DCF899HN-XJ 18V LI-ION XR CORDLESS WILL BE USING 18V 1.3AH LI-ION ON IT NEED ADVISE THANKS]

i only got it to do odd jobs on the car like the things that fail on the mot i normally use wrenches and normal tools which on these jobs are a right pain in the butt ,hopefully over time it will pay for its self the battery life won't bother me i have 2 so if they last  a job ,thanks for the reply's i may upgrade in the future .   

[DeWalt DEWALT DCF899HN-XJ 18V LI-ION XR CORDLESS WILL BE USING 18V 1.3AH LI-ION ON IT NEED ADVISE THANKS]

I need some advise i bought a DCD776C1-GB DDEWALT CORDLESS 18V 1.3AH LI-ION COMBI DRILL 2  BATTERY'S  in 2015 i now bought today a 

DEWALT DCF899HN-XJ 18V LI-ION XR CORDLESS IMPACT WRENCH - BARE UNIT  to use with   the 18V 1.3AH LI-ION battery that came with the drill  will these be ok the battery are in good condition and last on the drill , i have 2 batterys  i thought as i am not a full time mechanic and just the DIY  it will be used on my car for odd jobs i hope by using the  battery it  will give me  reasonable usage and save a few quid anyone got this set up and how much time would i get out of using the 1.3ah 

 

any help on i would appreciate the feedback