Li-ion 7.2V 3.6Ah is what I had done recently.
(Notebook size 3.6V 1.8AH x 4)
3 vertical 1 hozonital

Drill 2mm holes around the bottom, take out the old batteries & replaced.
(For Li-ion battery that protective circult board must be applied).
Epoxy seal it.
Normal charging is about 4 hrs.
I got ...

Thanks for all guys of great information.
That mean my ASIII suck the battery normally.
It did been replaced the 1700mAh Li-ion by myself. ( I should make it larger capacity.)
BUt I still wonder this wonderful HT with few standy time.( compare to other Ham HT)

Thanks
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This is brand new 1700mAh DIY Li-ion battery.
I just wonder why the standy time is so short, did it have any power save mode I could set?
Or it is normal using time of ASIII.

Thanks again.
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Newib, Astro III 1700mAh DIY battery used time too short for me.
7 hrs + 4 hrs with low battery icon. ( Standy only, no TX )
Is it normal for it?
Is there any way to extend the battery life?
Thanks a lot....

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Newbie to say hello to everyone, I got a Astro Saber III,
H04KDH9PW7AN
Flashport 0000010000009
AP_R03.20.01
DSP I05.00.18
EMC R01.00
KG1 DES-XL
Is it a very old model?
Is it a digital one?

I saw someone selling $160 VOCODER board that
VER 7.12.00.00
DSP N08.02.06
Flachcode 1800010000009

or other ...