Tom,
Consider cost vs. need and your intended power level.
If you are backpacking in, then weight is a consideration, so LiPo and
LiFePO4 batteries are to be preferred. IMHO, LiFePo4 are preferred
because they have terminal voltages similar to NiMH ot NiCad batteries
and the charging requirements are not as severe (and safety oriented) as
LiPo. LiPo batteries need special chargers to insure safety during
charging.
If you don't mind the weight of lead acid batteries, then the low cost
alternative is a "lawn mower" battery, or if spillage of the electrolyte
might be a problem, look at AGM or SLA batteries. That is old battery
technology, but it works and is the lesser expensive solution.
An almost zero cost solution is to run heavy gauge wires from your
vehicle battery. Just make sure there is enough energy left to start
your vehicle when you are ready to break camp.
73,
Don W3FPR
On 4/25/2016 7:57 PM, TFJM via Elecraft wrote:
I'm sure this question has been asked many times. I recently bought a KX3 so
I'm new at QRP and I'm about to head to a camp ground in a few weeks and go
portable. Besides using internal batteries, what longer lasting external
batteries are recommended? I hear of Lipo batteries and a slew of others.
I'm just trying to navigate though the maze of options.
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