TOMO M2 DIY 2x 18650 Power Bank (Banggood, Aliexpress: Output: 5V / 1, 2A, Battery: 2x 18650 li-ion battery (not included) (the best price with coupon)).
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Price history and price alert
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Price records source(s): Gearbest
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You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).