Acer must've wised up a while back, because I bought my laptop in October last year (during the affected time period where dodgy batteries were being sold with laptops) and my battery is a Sanyo. At least they decided to go elsewhere for batteries in good time! I'd hate to have to go batteryless in my laptop, even if it was only for a week or so (though that said, my laptop is currently on... On my bedroom floor... Plugged into the mains, and I only ever use it on the battery when I take it to Uni. Go figure. haha)
Be careful though if you have an Acer - the serial number for your battery is on the underside, so you have to take it out - but if you have a dodgy one, send it back sharpish! You don't want the chemicals inside to explode all over your nice pink fleshy legs, causing irreparable burn damage to your thighs (and most likely immense pain at the same time), do you?