i think the other folks are missing the point[but there points are valid]
from what you say you want it for odd jobs so to me this means you not useing it 8 hours a day[so charging times and spare batterys are not a real issue] as long as its got enough power go for a cheap as chips one.i would say at least 14volts and look in aldi etc
i used to think exactly that, i had 3 cheapo drillls, bought the first one from macro, replaced after complaining for similar priced other make, and aquired another of similar pruce and quality. All failed due to shite battery/charger combination, either the charger continued to charge the battery until it cooked it, or the battery just gradualy stoped taking charge until it stopped working, all 3 where dead in 3 months, all 3 had useable battery life that was conciderably shorter than than charge time to make it work in the first place.
So my advice, if it dont have lithium iron batterys then dont buy it unless you want to buy another one in 3months weather its used or not. So ask yourself how many "3months" will go buy before you could have paid for a decent lith ion equiped drill that will last for years, or 2years 6 months so far in my case.... light use counts for nout.
Any cordless drill or saw etc is only ever as good as the battery set with it, and will cost more to replace the failed battery than the whole set cost in the first place at that(cheap) price range....imo lithium iron minimum requirment.