|
Home > Archive > Electrical Engineering > February 2008 > Sub DC Adaptors
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
|
|
| live2getoff@gmail.com 2008-02-10, 1:25 pm |
| Have "Energizer" aa/aaa battery charger uses dc/cc 12v-500ma adaptor.
Can I substitute dc/cc 12v-700ma adaptor?
Poppa
| |
| Tim Perry 2008-02-10, 1:25 pm |
|
<live2getoff@gmail.com> wrote in message
news:bd906c69-2983-4373-9935-42604a17bffa@m34g2000hsb.googlegroups.com...
> Have "Energizer" aa/aaa battery charger uses dc/cc 12v-500ma adaptor.
> Can I substitute dc/cc 12v-700ma adaptor?
>
> Poppa
Without knowing what form of current limiting is employed by the charger the
only safe recommendation is: no, don't do it.
Recommendation: in cases like this contact the maker and get advise from an
engineer or technician that is familiar with the product.
| |
| live2getoff@gmail.com 2008-02-10, 1:25 pm |
| On Feb 10, 12:56=A0pm, "Tim Perry" <timpe...@nospammeadelphia.net>
wrote:
> <live2get...@gmail.com> wrote in message
>
> news:bd906c69-2983-4373-9935-42604a17bffa@m34g2000hsb.googlegroups.com...
>
>
>
> Without knowing what form of current limiting is employed by the charger t=
he
> only safe recommendation is: no, don't do it.
>
> Recommendation: in cases like this contact the maker and get advise from a=
n
> engineer or technician that is familiar with the product.
Thanks for the quick advice Tim....one more q.....back panel of
adaptor shows "output" as follows:
aa-dc/cc 2.8/5.6v 700ma
aaa-dc/cc 2.8/5.6v 350ma
Does this refer to ma current limiting or still need to talk with the
mfgs?
Really appreciate your help, Tim
| |
| Palindrome 2008-02-10, 5:25 pm |
| live2getoff@gmail.com wrote:
> On Feb 10, 12:56 pm, "Tim Perry" <timpe...@nospammeadelphia.net>
> wrote:
>
> Thanks for the quick advice Tim....one more q.....back panel of
> adaptor shows "output" as follows:
> aa-dc/cc 2.8/5.6v 700ma
> aaa-dc/cc 2.8/5.6v 350ma
>
> Does this refer to ma current limiting or still need to talk with the
> mfgs?
>
> Really appreciate your help, Tim
Chargers are designed for particular cells/batteries. If the charger you
have wasn't designed for the batteries that you have, there is a danger
that the batteries or the charger could be damaged. It may be OK to use
the charger for a different battery than that originally designed for,
but, in case of doubt, it is better to confirm that all will be OK with
the manufacturer (of either the batteries or the charger, or both).
The charger, from your description, can take either one or two pairs of
AA or AAA batteries. However, the charging currents that you mention are
far higher than the "trickle current" amounts that, near enough, will
always be safe for any rechargeable AA/AAA cell. Thus the charger must
have electronics to sense when the battery is fully charged and reduce
the current. Different battery types require different electronics. So,
if your batteries are the wrong type, charging at full current could
continue even after the batteries were fully charged..risking damage.
Hence, yes, if you are in any doubt, ask the manufacturer.
--
Sue
| |
| Tim Perry 2008-02-10, 5:25 pm |
|
<live2getoff@gmail.com> wrote in message
news:d46f0dbf-6213-420b-bde2-60e8e6de3dba@u10g2000prn.googlegroups.com...
On Feb 10, 12:56 pm, "Tim Perry" <timpe...@nospammeadelphia.net>
wrote:
> <live2get...@gmail.com> wrote in message
>
> news:bd906c69-2983-4373-9935-42604a17bffa@m34g2000hsb.googlegroups.com...
>
>
>
> Without knowing what form of current limiting is employed by the charger
the
> only safe recommendation is: no, don't do it.
>
> Recommendation: in cases like this contact the maker and get advise from
an
> engineer or technician that is familiar with the product.
>Thanks for the quick advice Tim....one more q.....back panel of
>adaptor shows "output" as follows:
>aa-dc/cc 2.8/5.6v 700ma
>aaa-dc/cc 2.8/5.6v 350ma
>Does this refer to ma current limiting or still need to talk with the
mfgs?
>Really appreciate your help, Tim
I would assume that 'CC' stands for charging current. probably max current
with the maximum number of cells under charge.
A web search show many many types of 'energiser' charges.
The one thing they have in common is a lack of data that would enable one to
answer the question: "is it OK to use a larger transformer"
From the above data I would assume that fully loaded with AA cells it
charges at 5.6 X .7 (max) for about 3.92 watts
You might want to read this http://www.greenbatteries.com/bachfa.html
It seems to cover the highlights of battery charges.
|
|
|
|
|