Rechargable batteries and information
 

In message , Mr. Benn
writes
"OG" wrote in message
...

"john hamiliton" wrote in message
...
My pocket sized DAB radio eats AAA size batteries like there is no
tomorrow.

Maplin are selling so called 'Hybrid' rechargable AAA 800 mAh at
four for £10.99. Whilst Argos are selling four 'ordinary
rechargable' AAA 850 mAh at £5.99 (and 1000 mAh AAA at £14.99,
which seems a big jump in proportional price for another 150 mAh ? )

In this DAB radio situation, would so called *Hybrids* be of any
extra advantage, considering they are practically twice the price of
Argos?

Grateful for any advice on the latest state of play with these
rechargable batteries, and any info on where best to buy them from.
Thanks.

Hybrids are better than ordinary NiMH batteries because they provide
a slightly higher voltage for longer. As it's usually the drop off in
voltage that triggers the 'low battery' warning you may well find that
a 850mAh hybrid will be significantly better than a 1000mAh ordinary
one, at least that's what I've found with my digital camera.

Hybrids have slightly less capacity than regular NiMH batteries but
lower self-discharge rate and hence longer shelf life. For a DAB radio
that's not used infrequently, I'd be inclined to use regular cells.

Are 'modern' DAB radios designed to work with the lower voltage you get
from NiMH (1.2V compared with 1.5V for non-rechargeable)? I've not tried
it lately, but I recall that my DAB radio (my ONLY DAB radio) doesn't
last long on rechargeables - maybe only an hour or two. After that, it
will keep going for some time on FM.
--
Ian

Rechargable batteries and information
 

On Tue, 15 Jun 2010, Ian Jackson wrote:


Are 'modern' DAB radios designed to work with the lower voltage you get from
NiMH (1.2V compared with 1.5V for non-rechargeable)? I've not tried it
lately, but I recall that my DAB radio (my ONLY DAB radio) doesn't last long
on rechargeables - maybe only an hour or two. After that, it will keep going
for some time on FM.


I have one that takes C size cells and it just doesn't work with
rechargable. I tried with some old nicads. It works if I put an extra
two into the circuit.

I have a couple of Roberts dab radios that have a switch to select battery
type. These seem OK.

Alan

Rechargable batteries and information
 

In message ford.ac,
Alan Clifford writes
On Tue, 15 Jun 2010, Ian Jackson wrote:


Are 'modern' DAB radios designed to work with the lower voltage you
get from NiMH (1.2V compared with 1.5V for non-rechargeable)? I've
not tried it lately, but I recall that my DAB radio (my ONLY DAB
radio) doesn't last long on rechargeables - maybe only an hour or
two. After that, it will keep going for some time on FM.


I have one that takes C size cells and it just doesn't work with
rechargable. I tried with some old nicads. It works if I put an extra
two into the circuit.

I have a couple of Roberts dab radios that have a switch to select
battery type. These seem OK.

Noted. Thanks.
Of course, in most sets, you can't simply add a couple more batteries.
--
Ian

Rechargable batteries and information
 

"Ian Jackson" wrote in message
...
In message ford.ac,
Alan Clifford writes
On Tue, 15 Jun 2010, Ian Jackson wrote:
snip
Noted. Thanks.
Of course, in most sets, you can't simply add a couple more batteries.
Ian

It depends on the battery case layout.
e.g. a series pair of AA can be substituted with 3 x 2/3rd AA

and C cells can be had in 2/3 3/5, etc. sizes

http://www.powerstream.com/Size.htm

Steve Terry
--
Welcome Sign-up Bonus of £1 when you signup free at:
http://www.topcashback.co.uk/ref/G4WWK

Rechargable batteries and information
 

Ian Jackson wrote:

Are 'modern' DAB radios designed to work with the lower voltage you get
from NiMH (1.2V compared with 1.5V for non-rechargeable)? I've not tried
it lately, but I recall that my DAB radio (my ONLY DAB radio) doesn't
last long on rechargeables - maybe only an hour or two. After that, it
will keep going for some time on FM.

That's going to be expensive on non-rechargeables! The end point
voltage for alkalines is about 0.9 volts, and they spend quite a lot of
their life below 1.2.

Rechargable batteries and information
 

David Woolley wrote:

Ian Jackson wrote:

Are 'modern' DAB radios designed to work with the lower voltage you
get from NiMH

That's going to be expensive on non-rechargeables! The end point voltage
for alkalines is about 0.9 volts, and they spend quite a lot of their
life below 1.2.

My Pure Evoke3 can either take C-Cells or a rechargeable battery pack,
it worked OK on normal NiMH C-Cells but I kept forgetting to take them
out and recharge them, so I bought their special pack (which contains
NiMH C cells and a small PCB and connects to a dedicated charging socket
not the battery terminals) this worked ok, but their charging circuit
absolutely cooked the NiMHs they were hot all the time, and didn't last
long, reluctantly I bought their newer rechargeable battery pack, which
is a LiPo and seems to charge sensibly ...

Rechargable batteries and information
 

In message , Steve Terry
writes
"Ian Jackson" wrote in message
...
In message ford.ac,
Alan Clifford writes
On Tue, 15 Jun 2010, Ian Jackson wrote:
snip
Noted. Thanks.
Of course, in most sets, you can't simply add a couple more batteries.
Ian

It depends on the battery case layout.
e.g. a series pair of AA can be substituted with 3 x 2/3rd AA

and C cells can be had in 2/3 3/5, etc. sizes

http://www.powerstream.com/Size.htm

I know that 'shortened' battery sizes exist, but I've never used them
myself. As they are non-standard, they are not so readily-available, and
(although I haven't checked yet), guess that they are more expensive.
--
Ian

Rechargable batteries and information
 

On Tue, 15 Jun 2010, Steve Terry wrote:

"Ian Jackson" wrote in message
...
In message ford.ac,
Alan Clifford writes
On Tue, 15 Jun 2010, Ian Jackson wrote:
snip
Noted. Thanks.
Of course, in most sets, you can't simply add a couple more batteries.
Ian

It depends on the battery case layout.
e.g. a series pair of AA can be substituted with 3 x 2/3rd AA

and C cells can be had in 2/3 3/5, etc. sizes


My solution was rather more heath-Robinson than that. Your information
about battery sizes stored away for future reference though.

We keep that radio plugged into the mains in the kitchen and pretend it
isn't a portable because it isn't really.

Alan

Rechargable batteries and information
 

"David Woolley" wrote in message
...
Ian Jackson wrote:

Are 'modern' DAB radios designed to work with the lower voltage you get
from NiMH (1.2V compared with 1.5V for non-rechargeable)? I've not tried
it lately, but I recall that my DAB radio (my ONLY DAB radio) doesn't
last long on rechargeables - maybe only an hour or two. After that, it
will keep going for some time on FM.

That's going to be expensive on non-rechargeables! The end point voltage
for alkalines is about 0.9 volts, and they spend quite a lot of their life
below 1.2.

Indeed.

There is an appallingly large amount of equipment around doesn't get
anywhere near using all the available energy in the expensive batteries that
power it.

I've had particularly bad experiences with digital cameras.

--

Brian Gregory. (In the UK)

To email me remove the letter vee.

Rechargable batteries and information
 

"Andy Burns" wrote in message
o.uk...
David Woolley wrote:

Ian Jackson wrote:

Are 'modern' DAB radios designed to work with the lower voltage you
get from NiMH

That's going to be expensive on non-rechargeables! The end point voltage
for alkalines is about 0.9 volts, and they spend quite a lot of their
life below 1.2.

My Pure Evoke3 can either take C-Cells or a rechargeable battery pack, it
worked OK on normal NiMH C-Cells but I kept forgetting to take them out
and recharge them, so I bought their special pack (which contains NiMH C
cells and a small PCB and connects to a dedicated charging socket not the
battery terminals) this worked ok, but their charging circuit absolutely
cooked the NiMHs they were hot all the time, and didn't last long,
reluctantly I bought their newer rechargeable battery pack, which is a
LiPo and seems to charge sensibly ...

It's much easier to detect when a LiPo cell is fully charged.
And thank goodness it is because they tend to explode if you overcharge
them.

--

Brian Gregory. (In the UK)

To email me remove the letter vee.