reviving my 9 year old OEM battery?should i try

[omodos]

ok ladies and gents don't srone me to death but I recently changed out my OEM battery it was an 2004 battery, now the little indicator 'bulb' was on black so meant insufficiently charged...but did start although somewhat laboured, and so pre-emptively swapped it out cos of my 'cold' start issues as mentioned in previous posts....

now just curious should i stick it on a battery charger and see if it ever reaches green and fully charged?

ps the oem battery weighed a tonne comapared to the bosch replacement...is it a case of oem being better or technology getting lighter and more efficient, more energy pound for pound......