In article ,
"Brian 2W0BDW" wrote:

"ml" wrote in message
...
ok this isn't exactly a antenna question but hope it's ok

I have a super powergate ... and a 8g27 gel battery

i got a battery from a friend a smaller 25am battery , cant figure out
the chemestry but seems like agm

so the battery is smaller sized, and perhaps/probably different type(not
gel )

i therefore presumed i couldn't parrallel them as they would get
different charge rates and poof

but someone said that it's ok and each battery will just draw what it
needs as it's resistance changes (presuming that both batteries were
at equal Volts when i hook them up initially to avoid bat a charging bat
b


but unsure and feel i should double check a 8g27 blowing up in the
house wouldn't be fun


thanks

If you are unsure then fit a diode on the + terminal of each battery ( one
that can handle the current you are going to draw ) with the cathode away
from the battery and connect the cathode ends of the diodes together, take
your power from this point.

Hey presto the batteries will 'ignore' each other.

If you are going to charge them together you can do the same on the + lead
of the charger, this time the cathode goes to the battery and the anode
goes to the charger.

I used to parallel NiCads like this before hi capacity NiMhs came on the
market. (NiCad batteries do NOT like to be parallel connected at all!)

Hope this helps

Brian

thanks very much for the help i sorta thought about diodes but
figured hen say both bateries are charged or even 1 how would my
charger be able to 'sence' this from the batery? and how would it say
stop charging bat a but still flow V to the 2nd batt? "if they are
parrrallel"
so my fear is in charging mode 1 batt might get way overcharged ????