vladkorotnev at gmail.com
Tue Dec 3 19:58:18 EST 2019
Thanks for your warning Frank,
One thought that springs to my mind about the current capabilities is,
was it a holder with "spring"-type contacts or with "flat bent metal
For some reason I have a feeling the latter should withstand more
current due to better surface area.
That is, even if 1.2A-capable battery holders exist at all -- 'cause
1.2 amps is quite a ton for a usual AA battery pack in general.
Worst case scenario, just don't charge them inside the eMate and use a
simple charger externally instead, I guess.
On 12/4/19, NewtonTalk <newtontalk at pda-soft.de> wrote:
>> Ok so I bought 4aa Nimh rechargables and a plastic holder for them. I
> wired them up to my emate 300
>> and the batteries will not charge (says too much power so they wont
> charge) and then says fault.
>> What am i doing wrong here ?
> Most likely you have forgotten to transplant the temperature resistor from
> the old pack. See
> This will also explain why you can, but shouldn't, omit to also transplant
> the overcurrent protection switch.
> That being said: I'd strongly advise everyone to refrain from using an
> off-the-shelf battery holder in his eMate. On and off, I've tinkered with
> this for the last 15 years or so, and as yet I haven't found a seller who
> was willing, let alone capable, to provide me with a data sheet that sheds
> any light on the battery holder's contacts maximum current specification.
> Contacts in a holder suitable for an eMate must be specified for a
> continuous load of 1.2 Amps or more. This is bacause the eMate will be
> charged with 1.2 Amps when using the original AC adapter.
> Some years ago, when I tried this for the first time with a normal holder
> like the ones you buy at Radio Shack, it took the eMate about five minutes
> to melt the plastic surrounding the holder's metal contacts. This was
> because the contacts couldn't withstand the charge current and became hot
> like hell. Thank God most cheap battery holders' plastic develops a
> disgusting smell when melting. So disgusting I was able to smell it one
> floor below. Otherwise my house might have gone up in smoke.
> I'm not kidding. Either insist on a datasheet and make sure the holder can
> handle a continuous load of 1.2 Amps charge current, or forget it. Unless,
> of course, you are homicidal or suicidally inclined...
> -- Newton software and hardware at http://www.pda-soft.de
iOS/Mac/Windows & Web developer
Vaporwave/ambient producer, sound/video engineer
Genjitsu Gadget Lab Member 001
More information about the NewtonTalk