[TriLUG] recommendations for UPS 12V batteries?

[Joseph Mack NA3T via TriLUG]

On Sat, 18 Apr 2020, shay walters wrote:

>   Lately I've been getting batteries from Amazon with pretty good
> results.
.
.
> https://www.amazon.com/gp/product/B00EUGZMOE

I've just done a control. Earlier this week I replaced 10 year old batteries in 
one big UPS with Batteries Plus batteries. Just now I replaced the 10 year old 
batteries in an identical UPS with Amazon batteries recommended by Shay.

I didn't look at the open circuit voltage on any of the batteries or the date 
stamps. I did notice that the bubble wrap on all the Amazon batteries had "12-9" 
in marker pen. I assume they were wrapped on 9 Dec and have not been charged 
since. (I think 4 months is a long time to leave a lead acid battery.)

Batteries Plus batteries: came up with 2 bars of 5 on the UPSs voltage meter and 
took about half a day to get to 5 bars. This was not good. I expect new 
batteries to be fully charged.

Amazon Batteries: came up with 4 bars of 5. The 4 bars is likely the difference 
between the open circuit voltage of a charged battery (12.6V) and the float 
voltage when on charge (13.8V). I'm impressed that the batteries have kept their 
charge (4 bars) for 4 months.

I assume the Batteries Plus batteries had little charge on them and have been 
sulphating up while they sit on a shelf waiting to be sold. It's hard to imagine 
stock sits around in the store very long as when I'm in there, the staff are 
always filling the shelves. Maybe the batteries sit in some warehouse somewhere 
for long time before they're delivered to the retail stores.

Maybe the problem is Batteries Plus batteries.

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant
map generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!