[Milsurplus] BB-490

[Peter Gottlieb]

Agreed, the lead acid 490s were a disaster.  They can also be used in the 
PRC-104 if you have the big battery box but they are heavy and even when good 
have poor life.

To give an idea of modernizing that can be done, I took the small PRC-104 
battery box and using NiMH cells fit 8.8 AH of capacity in there.  Compare to 
the pair of BB-490's which total 2.8 AH, and are twice the size and weight.

Peter

Alan Tasker wrote:
> 
>> Can anyone tell me what battery BB-490/U is used in.  I have 2 of them 
>> and
>> the charger, NIB.
> 
> 
> The BB-490 were an example of a bad idea that went downhill from there.
> 
> There are a number of Military portables that use either 12 V or 24 V. A 
> number of identical sized batteries were developed that had two 
> (matched) 12 V sections inside, so the two could be put in series for 24 
> V applications, and in parallel for 12 V applications. There was the 
> BB-390 (NMH I think), and BB-590 (NiCad I think), and the BA-5590 
> (Lithium), and the BB-490 (Lead acid). The lead acid system needs to be 
> kept charged or the cells will sulphate. I do not think the military is 
> the place for what turns out to be a high maintenance application. 
> Chances are 99.44% that the batteries you have do not have anywhere near 
> the capacity they are supposed to.
> 
> Anyway, the answer to your original question is SINCGARS, most of the 
> SATCOM sets, PRC-113 I think, and others I forget.
> 
> 
> 
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