[T-Mobile myTouch 4G Slide] MT4GS:
My final 'report' + few notes after couple of weeks with this "Gold" battery (and after reading your follow-up posts since my last one):

1000mAh ?

Well, if this "Gold" 2450mAh battery is supposedly only 1000mAh (as someone stated few posts back) then our "original" battery would have to be about 600-650mAh.

1: Just by the size and weight it is impossible. I have 650mAh and 960mAh Li-Ion and Li-Po batteries for my cameras, and 650 is 1/2 and 960 is about 1/3 smaller, and both weight less than our "original" batteries.

2: Also such huge discrepancy is impossible even by chinese manufacturers (lack of) standards.

I don't know what does it say underneath the gold metallic wrapper (I will rip it apart when it dies) but I seriously doubt it is only 1000mAh, because I trust HTC's original battery is more-less 1520mAh, and since this "Gold" battery lasts with the same use at least 60% longer than my "original" batt, logically it has to have at least 60% larger capacity too.

edit: and simple math confirms it: 1520x1.6=2432 (almost 2450 as described).

Are we talking about the same "gold 2450" batteries?

BTW: why not post a picture of that ripped-apart "Gold" battery (where it says 1000mAh) for all of us?

Initial charging

Guys, the first charging you do

are the ones that will make it or break it

. Seriously.

Li-Ion (and Li-Po) batts are always factory-charged to less than 50% (30%-45%) for storage.

You should drain it down (ideally to to 5%) at first, then fully charge it. Repeat it at least 3 times. Read my first posts from 1st/2nd/3rd charging: after each time the charging time decreased while capacity increased, it was after 4th or 5th charge when my battery start to be constant with charging times and how long it last.

Only after those first few charges your battery is fully ready and *then* you should measure it's real capacity.

If you follow some different charging/discharging pattern during those crucial first few charges, you most likely will decrese battery's capacity and/or longevity.

I know it is only few bucks, but still - it applies to any brand Li-Ion/Li-Po batts.

(I don't have links, but it's a common knowledge, google it and I'm sure you'll find info backing me up).

"Gold" 2450mAh vs Anker 1900mAh

Friend of mine bought set of 2 Anker 1900mAh slim batteries with charger, and he let me try his 1st "ready' Anker for 2 days while he started using/"conditioning" his second battery.

On 1st day of my normal use this Anker batt didn't last me till end of the day. I removed phone from charger cradle at 7:20AM and it was going into power save at 15% just after 6PM (phone was with everything ON, same as I normally have it with my "Gold" batt).

The 2nd day was better, it lasted from 8AM to around 9:30PM when 15% power save kicked-in, but I forgot to turn on wi-fi back after doing 4G speed tests in downtown around noon time, so I'm sure this has something to do with it too, since more than half the day my phone had wi-fi OFF.

So - in conclusion of comparison - I am happy I didn't go with slim 1900mAh Anker batt, as my "Gold" 2450mAh always lasts more than full day of my normal use and up to 2 days of light use (1.5 day is probably average for me, because I often forget to charge it overnight and next day I have to plug it in my car in the afternoon ).

I'm sure it is those 500mAh+ more capacity of the "Gold" batt what makes the difference.

Weird thing:

I noticed this "Gold" battery has a weird pattern when charge is very low. Perhaps it is because my phone isn't calibrated with this battery, I don't know (I just started reading up about all these "calibration" apps).

When it is down to 15% I never have more than 5min of phone usage left (by usage I mean: screen and everything else is ON) before it goes down to 10%, 5% and shutdown presumably at 5%. With Anker 1900mAh it lasted for 20+min between 15% and 5% warnings (but screen wasn't on). With original HTC battery it lasted for 12min (I just tested it too few days ago - BTW I can't imagine using the original battery ever again! We should make a class action suit against HTC, these original batts are like a crime against mobility in general!).

So either it discharges weird, or - most likely - my phone doesn't show the percentage correctly (i.e. 15% is not really 15% but maybe certainly much less).

/edit: my friend just read this post and messaged me that in his opinion that's how Li-Po batteries behave at low charge status. Anyone knowledgeable could confirm or deny it? Somehow I didn't notice this with my other Li-Po camera and other batts

Well, that's all I have to say in my final 'report' :)

HTH and apologies for posting a "book" again ;) :D