I need a new battery for my DC34 Animal the battery on is days it's "1300 mAh"
and there's onw ith "more power" on eBay with the same voltage (22.2V) with 2200 mAh
So what difference does it make?!
I literally have no idea what it is. Is it the runtime?
There's also a 1500 mAh one on eBay which I'm more tempted with since it's closer specified to the genuine one of mine
It's rather straightforward. If the vacuum pulls 100mAh, with no accounting for energy loss within the battery itself, a 1300mAh battery would run it for 13 hours. Likely, it pulls 13,000mAh, or 1/10th of an hour, or 6 minutes.
So, a 2200mAh battery would last almost twice as long, in theory, but many of those eBay batteries are poorly constructed (i.e. might have the materials required to hit that power capacity, but never can because they're trash) or are outright lies on capacity. Some also have poor charging circuitry (see: exploding hoverboards, Galaxy Note 7).
A bigger battery, if of good quality, is not a problem at all. It might be bigger or heavier, but it's not a problem to give the vacuum more juice. Differing voltage would be a problem, however...
I want to eventually add more cells to my DC35. The battery will hang down a bit and weigh twice as much but last 10+ minutes on high.