Small battery on 20xe nova

[dumpycorsa]

Hi. Had a look under the bonnet of a mates 200sx and noticed he was running a very small and light battery. He's now sent me the link to where he got it. Question is will it be reliable on my xe? The amp/hour rating is quite low and I'm worried it may keep going flat. Im not running a big stereo so as far as drain is concerned its only starting the car and the electric windows. I'm also running a small jap type alternator and a small bottom pulley

http://www.apexperformance.co.uk/catalog/product_info.php?cPath=120_451_130_148_149&products_id=1394&PHPSESSID=febcb573a8d9db4e6c35cb6e72e2b70f

[Count Vaux Alot]

The likes of rally designs etc. do similar http://www.rallydesign.co.uk/index.php?cPath=692&osCsid=pcig6ioctj83ontph92tqmjqr2

[L14MNP]

Can't see it running flat on a 2.0 Nova if his SX was fine dude. A mate of mine had an Odyssey (iirc) on his S14a and it was no bother, that was running a HU, heaters etc - it was a full car.

[dumpycorsa]

May get myself one then. Ive found one on ebay thats a bit cheaper...http://cgi.ebay.co.uk/MX5-Westco-Battery-fits-all-MX-5-and-Eunos_W0QQitemZ190299132315QQcmdZViewItemQQptZUK_C arsParts_Vehicles_CarParts_SM?hash=item19029913231 5&_trksid=p3286.c0.m14&_trkparms=72%3A1683%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318


Hopefully it'll have enough kick to turn the engine over (I'm also running 12.5:1 compression ratiolol )