You may have heard myself praise Nokia's 'hero' battery, the Lithium-Polymer BP-4L, rated at 1500mAh, and used in everything from the E61 to the E90, most Eseries devices seem to be based on it, plus it's the core of the likes of the 6650 and N97. Anyway, it turns out that David Gilson (of this parish) reviewed a third party 'drop in' (i.e. no new phone back needed) replacement for the BP-4L, rated at 1900mAh, back at the end of 2009. Having updated it with new information (it works properly in the N97, but didn't in the original phone), I thought you'd be interested in having a read too.
Read on in the full article.
the e61 used, like the n800 from which i write this a bp-5l which was a thicker, black 1500 li-ION battery. the e61i, n810 , e71 and so on use the newer, thinner bp-4l
^^^^
BP-5L is first used in Nokia9500 communicator... It was slightly thicker than BP-4L, even though both have 1500mAh rating.. Further the 3 points (Positive, Negative, Battery-Removal Sensor) are in centre of BP-5L and in BP-4L they are around the corner and they are inside small pit for each point...
use it and you lose the phone's warranty.
How exactly did they squeeze an extra 400mah of power in the same sized volume without increasing the size too much?
'Hero' battery is a nice description but the real hero is Epoc's power management, second to none after all these years.
how about the WebOS UI running on the Symbian kernel? I'd sell this iPhone immediately, and it would kill Android (not a great UI and not great power management either) stone dead.
I had a real tough time getting a replacement battery for the BP-5L in my N800. The original Nokia replacement costs 2800 rupees (~60 USD) and has a two week wait time. I finally got a no-name battery for 275 rupees and it has worked fairly well.
I've had a similar experience getting a replacement for my N82. The BP-6MT battery is difficult to procure. In the two or three shops where I've found a piece, they never had an sealed one, which makes it difficult to determine if the battery is used or not.
I'd really support all manufacturers moving to a unified standard for Li-On batteries. But then, they'd lose one of their cash cows.