The Watson Lithium-Ion Battery Pack for HERO3 & HERO3+ works with the same camera as the GoPro AHDBT-301 and AHDBT-302. This replacement battery pack features a capacity of 1200mAh and 3.7V of output power. Small and lightweight, Lithium-Ion batteries can be charged or discharged at any time without developing memory effects.
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I have used Watson batteries when OEM batteries have become unavailable with great success. I my experience they work as well and last as long as the OEM products. I choose to buy from B&H because they are reputable, unlike a lot of no-name dealers who (potentially) sell counterfeit products on that on-line bazaar known as Amazon. If you need a product you can depend on, such as batteries or memory cards, stick to reputable dealers.
I recently purchased this battery for a used Go Pro Hero 3 Black I was recently given. After charging this battery up and riding along with the original go pro battery and this one. After the original ran out of juice this battery did its job well. Even had power left after my ride which was better then expected. Love it so much I bought another one with the charging kit as well!