This part is a must for all Vielfotografierer. Thus one has practically two batteries in the camera and does a possibly but essentials battery change on the fly ... With the additional Bedinelementen I have to get used yet because portrait is relatively rare with me. Useful is the lever to LOCK operation lock. For the price you would still be able to settle a spare battery;) As for the batteries used are the cheaper alternative "BLN1" may not be recommended ... When using the battery should put priority on the handle and conserve the energy storage in the camera. Then you have the battery grip to change the batteries not dismantle - so always keep a third battery. :)
