Protected, button top. Unless you need a constant discharge rate above 3A, the UR14500P is the best 14500 cell currently produced. This cell features a high-quality protection circuit that prevents short circuit, overcharge, and undercharge. The protection circuit is set to trip at around 3A. Batteries are sold individually.
Why does the sticker show 800mAh when the UR14500 is rated for 840mAh? Most protection circuits stickers are rounded to the nearest hundred. With the protected GA, for example, the specification of the GA cell is rated at 3450mAh, but it is marked as 3500mAh. It is the same for the Sanyo 14500 - it is rated to the nearest hundred which is 800mAh.