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In case it helps anyone,
I’ve just replaced the batteries in our Sena SMH5 intercoms as they no longer held charge for more than a couple of hours
The original batteries are 3.7v 350mAh Li-Po
I bought two of these 500mAh which should last a bit longer than the originals which already did a whole day when new
https://www.amazon.fr/gp/product/B079Z9C8N5/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
They are slightly longer than the original battery so you need to cut two small plastic webs out of the battery holder and then they fit perfectly, the polarity and connector are the same as the original
You’ll need a T7 torx bit to unscrew the back of the unit and the battery is just held in with double sided tape
At 25 euros delivered for the pair it’s a lot better than buying 2 new intercoms
I’ve just replaced the batteries in our Sena SMH5 intercoms as they no longer held charge for more than a couple of hours
The original batteries are 3.7v 350mAh Li-Po
I bought two of these 500mAh which should last a bit longer than the originals which already did a whole day when new
https://www.amazon.fr/gp/product/B079Z9C8N5/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
They are slightly longer than the original battery so you need to cut two small plastic webs out of the battery holder and then they fit perfectly, the polarity and connector are the same as the original
You’ll need a T7 torx bit to unscrew the back of the unit and the battery is just held in with double sided tape
At 25 euros delivered for the pair it’s a lot better than buying 2 new intercoms