[Elecraft] Car-Starter battery packs

[Phil Kane]

On 7/8/2017 8:28 AM, Charlie T, K3ICH wrote:

> At first glance, they'd seem ideal for a field pack for portable radio
> operation.
> They certainly can't be limited in their current capability, considering
> what it takes to start even a small car's engine.
> But then, their ratings may be extremely optimistic.
> 
> Anybody gat any thoughts on these?

Don't be misled by the A-Hr ratings.  Battery construction for
short-term high-amperage discharge (such as car starting) is radically
different from that for long-duration low-amperage loads such as
proposed.  Ditto for deep-discharge and float charge  capabilities as
well as battery chemistry.

We run across these questions frequently in design of communication site
standby power.
I would examine the specs very carefully.

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73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

>From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon