Official GoPro Hero 4 Black/Silver battery for $12

If you are looking for extra official GoPro batteries for your GoPro Hero 4 Black or Silver, the AHDBT-401 (1160 mAh), they are currently on sale for $12 each, with a limit of 30 per customer, at Amazon by Amazon itself. This battery averages 4.4 out of 5 with nearly 1000 customer reviews. A testament to the popularity of the GoPros when an extra battery can get close to 1000 reviews!

If you need any other GoPro accessories, there is a dedicated GoPro accessories page at Amazon with over 600 items.