NinjaBattBattery for Acer AS10D31 AS10D51 AS10D56 AS10D75 AS10D81 AS10D61 AS10D41 AS10D73 AS10D71 AS10D3E Aspire 5250 5733z 5750 7741 5733 5755 5253 - High Performance [6 Cells/4400 mAh/48WH]

Excellent battery...I only use my notebook rarely and when I found it in a poked away in a drawer I realised I hadn't used it for 18 months!I didn't attempt to see if there was any voltage (wished I had) just put it on mains chargeuntil full.I will spare you the hours of updates that it required.This is a nearly 16 year old Acer, original built for Win 7 and being clogged up was an understatement.Saved precoius, wiped the lot.Split HDD and have Win 7 Ultimate for thge same reason people keep vintage cars. the look of it and the Iconsput Win 10 & 11 to shame. Not an Apple fan but they kept their 'look' but still look good.I digress, I don't know the average time a notebook battery shoulkd last, as it would depend on the type of work....but it keeps going for several hours as I hoped that using the battery would maintain it's expected lifespan.So well done Ninja...you in my eyes have made and excellent product with and exterior built quality as good as the original!I would recommend you to anyone and everyone, Princes and paupers and the Crowned Heads of Europe...

Great product and quality holds charge as it said well pleased

I got this when my wife asked me to resurrect a 10 year old laptop so one of he friends could have e-mail and simple browsing access when a tablet died. I cannot remember the life span of the original battery - I think it may have been a few hours. Having spent a hour or so looking at options for a replacement battery I plumped for Ninja Battery as it seemed a reasonable price and offered next day delivery. It arrived as promised and was *very* well packaged. Fits as well as the original albeit not in an Acer laptop - I ordered based on the battery part number and this was fine. I have had limited chance to test the battery life but watching DVDs (played in the DVD drive) it seems good for a couple of hours. I presume if not having to deal with the mechanical aspects of running a DVD the battery should last longer with browsing or e-mail alone. Anyway, this is fine for my purpose. Compared with modern laptops the battery lifetime is poor (reflected in the score) but I *think* it wasn't great back in the day with the original battery.

Worked right from the start. Simple to fit and easy to use. No idea on its life yet, but the battery charged up easily and so far no problems. The great thing is my old laptop has a new life and that's a big saving.

Powers my old laptop like new. Fitted, charged and put to work. Would recommend.

Excellent product, clear instructions on conditioning the battery, good life, great value for the money.

This is the 2nd one we have had over the year's, really good battery so simple to use and hopefully it will last a few year's like the last one. Definitely recommend

Great replacement for my laptop excellent product.