The Olympus HLD-5 is an optional power battery holder created especially for the E-620. In addition to increasing the number of shots that can be taken, it is equipped with a shutter release button. The unit can hold two BLS-1 lithium ion batteries.
Reviewed by 2 customers
Olympus HLD-5 doubles your battery life and makes the camera much easier to hold,especially if you have a heavier lens like the 12-60 swd which weighs more than the kit lens'
I like this and I like having the two batteries right to hand. It's probably my imagination that made me feel as though the camera operates more smoothly, but even so more amperage is more driving force. The batteries are easily changed when a tripod or monopod is used and the added shutter button is sometimes easier to reach. This doesn't make the camera too large - it only makes it ALMOST as large as a full sized sensor camera always is, yet still lighter and easier to handle. No E-620 should be without this as an option, IMO.