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Can I connect (parallel) cell phone batteries?

Q

Q

Jan 1, 1970
0
Hi,

I want to increase siemens c35 (cell phone)
working time;

Can I connect (parallel) 2 or more
cell phone batteries?

Choose Li-Ion, polymer or another?

/the batteries will be the same type, model, capacity, ...

Best regards,
Q
 
R

Rich Grise

Jan 1, 1970
0
Q said:
Hi,

I want to increase siemens c35 (cell phone)
working time;

Can I connect (parallel) 2 or more
cell phone batteries?

Choose Li-Ion, polymer or another?

/the batteries will be the same type, model, capacity, ...
If they're also at equal state of charge, there should be no
problem. But when charging them, I'd still do them individually.

Good Luck!
Rich
 
I

Ian Stirling

Jan 1, 1970
0
Q said:
Hi,

I want to increase siemens c35 (cell phone)
working time;

Can I connect (parallel) 2 or more
cell phone batteries?

Yes, but...
If the batteries are single-cell, then this can be done safely (for
typically only 2-3 batteries before needing fusing in case one cell
goes short).

The problem arises with the charger, which won't know how to
read two cells at once, and may cut off before they are charged, even
if it 'worked'.

The much, much better solution is either to get a phone with a longer
battery life, or connect an external battery pack to the charger input
of the phone.
A 12V car adaptor for the phone, and a small lead-acid battery
will give many, many times the existing battery life.
 
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