What to expect going cheap battery replacements for P70???

[Jman99]

I'm all for genuine oem batteries, but I can't find any online sources selling genuine (the price is a dead giveaway!). So I'm wanting to know what to expect from the cheap aftermarket replacements. I use my battery mainly for lite duties only (watching dvds, music) and in between moving locations.

Yes I'm well aware they use low grade cells, but do these cheap aftermarket batteries work? Is it going to be denied or blocked? Just wanting to get the general consensus on compatibility.

thanks