Sanag M13 Pro Wireless Bluetooth Smart Portable Speaker has a very simple 18650 battery with only capacity of 1800mAh. Normally a 18650mAh battery has at least 2200mAh, so it is quite strange that Sanag M13 Pro is equiped with a 1800mAh battery. However Sanag claims that its battery can provides up to 20 hours of playback.
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