EEMB Lithium Polymer battery 3.7V 2000mAh 103454 Lipo Rechargeable Battery Pack with wire JST Connector for Bluetooth Speaker and Dashcam-confirm device & connector polarity before purchase(4)

Owning an old Wii U console which uses a proprietary battery is a problem, especially when the options for replacement are limited.So after buying some cheap replacements from China which claimed high mAh but only lasted 30 minutes I thought I would look for a DIY alternative.I used the old battery as a donor for the charging circuit which was desoldered after a little struggle with the plastic case. The EEMB battery is very neat, smaller than the Wii U battery but slightly thicker. I then checked the polarity of the EEMB battery and soldered on the charging circuit.Due to the thickness of the new battery I only used half of the plastic case but it won't be seen with the cover on.The battery charged fine and lasted for nearly 1hr 30 in the gamepad. So very happy with this little 2000 mAh battery.

Despite what other reviewers have mentioned these batteries work perfectly and are well built. I bought several and all are still holding charge well.I would imagine they've either damaged the built in BMC not checking the polarity of the JST connector or have drawn too much current.Furthermore, the reviewer stating the battery is bloated should check the spec sheet on the dimension tolerances. All my packs look very similar with a ridge on the top and bottom where the battery layers have been folded back on themselves due to the compact nature of the battery. Might not be perfectly smooth like the product picture (which is most likely Photoshopped) but the batteries look like any other pouch cell I've used, have defiantly not off-gassed and are perfectly safe if treated with respect.

Nice battery. Lasts for ages but had to change connector polarity to be compatible to Adafruit Bluefruit LE. My advice on these types of battery is always check polarity matches before plugging in.

Perfect for my puppy toy,long life battery

Didn’t function in the AJAX alarm, fairly useless I’m afraid 😔

Does what it says on the tin

I had to swap the connector pins as all the batteries had the positive in the negative position and the negative in the positive position!!

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