Start wont turn over after installing radio

[MC_JP]

Hello guys,
So this is what i did yesterday

*Rolls out the AE86 from the garage* Okay *instert key en turns - klik* DAMN
First thing then : check the battery = 13.40 Volts
Mmmmh should be enough.

*Grabs hammer* Can't stop, hammer time! 1 gentle tap with the hammer on the starter.
*turns key* - *huf huf huf huf huf huf BROAM BROAM*
Fixed.

Then i installed my subwoofer and amp. started the car few times. no problem.

Banpei what are the best batteries for a AE86 ? will be taking a hammer along now when i'm driving