I have three Sanwa MM-BTSH30 headsets( I teach English over Skype in Japan.
https://www.sanwa.co.jp/product/syohin.asp?code=MM-BTSH30BK.
The recommended retail price is around ¥8,400 but I got mine for around ¥3,000
They come in Pink & Black and for some reason the Black ones seem to have a longer battery life.
The stock battery is rated at 3.7 v 320 mAh
In any case I must always have one set charging or on standby.
One of the Pink headsets developed an obvious electrical fault so with nothing to lose I hacked in a 2000 mAh battery and . . it works now with some limitations = can't change the audio level but that 'could' be my fault during the install. still, I am getting well over 24 hrs continuous use now and probably will be able to fix the lack of audio volume control
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Today, my main Black set lost charge after 30 mins operation so I whipped down to my loacl electrical store and got a 3.7v 860 mAh battery. I had to cut a small section out of the right phone cover to allow it to be seated. I charged it up and it's working great ! Tomorrow I'm going to buy 4 of these batteries for future use.
Hint. . . . If you plan to install a larger capacity battery ..
1. Open the headset/phones very slowly & carefully . .. the speaker wires are delicate !
If you're lucky your headset /phones will have a socket which will make it a 5 minute job.
2. Photograph ALL the connections.
3. I have seen warnings on the net .. not to go over 2,000 mAh capacity batteries.
make sure that your replacement battey is teh same voltage. . mine are all 3.7v
That's it.
https://www.sanwa.co.jp/product/syohin.asp?code=MM-BTSH30BK.
The recommended retail price is around ¥8,400 but I got mine for around ¥3,000
They come in Pink & Black and for some reason the Black ones seem to have a longer battery life.
The stock battery is rated at 3.7 v 320 mAh
In any case I must always have one set charging or on standby.
One of the Pink headsets developed an obvious electrical fault so with nothing to lose I hacked in a 2000 mAh battery and . . it works now with some limitations = can't change the audio level but that 'could' be my fault during the install. still, I am getting well over 24 hrs continuous use now and probably will be able to fix the lack of audio volume control
========
Today, my main Black set lost charge after 30 mins operation so I whipped down to my loacl electrical store and got a 3.7v 860 mAh battery. I had to cut a small section out of the right phone cover to allow it to be seated. I charged it up and it's working great ! Tomorrow I'm going to buy 4 of these batteries for future use.
Hint. . . . If you plan to install a larger capacity battery ..
1. Open the headset/phones very slowly & carefully . .. the speaker wires are delicate !
If you're lucky your headset /phones will have a socket which will make it a 5 minute job.
2. Photograph ALL the connections.
3. I have seen warnings on the net .. not to go over 2,000 mAh capacity batteries.
make sure that your replacement battey is teh same voltage. . mine are all 3.7v
That's it.