'scuse me?
The chips on the battery are ONLY for overcurrent and under voltage.
The charge controller is on the main board. It's the 8 pin dip above the 2uH choke. It's a combination LiIon charger controller and 5v inverter device that is commonly used in those auxiliary portable battery power packs for charging 5v devices.
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On Sun, Aug 25, 2019 at 06:40 PM, Peter Mulhare wrote:
Hi Larry,
Please be aware, that the charging chips (x2), are mounted on the Battery.
Actually within the transparent heatshrink wrapper of the Battery itself, not
on the nanoVNA Board! Or at least on my unit they are.... when considering
the number of variations there are of these units.
Regards
Pete
ZL2iK
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Larry Rothman
Sent: Monday, 26 August 2019 09:42
To: [email protected]
Subject: Re: [nanovna-users] Battery?
Hi Frank,
If you dont mind a thin battery stuck to the rear of the unit, you can use any
lithium device from a cellphone. Just solder leads from the battery to the
spots on the nano. The nano already has a lithium charging chip. I did that on
my first unit. Standalone cellphone batteries already have protection
circuitry built-in. This has already been discussed back in June.
If you would rather have a small lithium so you can install it inside, go to
your local discount dollar store and buy a $5 mp3 player, open it up and use
the battery.
Regards
Larry
