Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Original SJCAM 900mAh battery (2 pcs.), Fit for SJ4000 / SJ4000 WiFi / SJ5000 / SJ5000 WiFi / SJ5000 Plus / M10 / M10 WiFi / M10 Plus action camera, Package Contents: 1x Original SJCAM Dual Slot Battery Charger, 2x 900mAh Battery
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
There is only one database record (it was for $9.13), so you can’t see price history chart.
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)).