A large battery charger or AC adapter may take up more outlets on a power strip. If you want the case above, the following Plug Power outlet adapter should be able to help you.
Plug Power is an innovative and practical single outlet adapter deigned to offer you a three-prong outlet that keeps any plug from covering an unused outlet. The single outlet adapter measures 38.5 x 32 x 32mm, and as we can see from the images, Plug Power features a compact design for portability, and when you plug the outlet adapter to your power strip or wall outlet, the extended cable can prevent your AC adapter or battery charger from blocking other outlets on the wall or power strip. Apart from that, when the outlet adapter is plugged into itself, you can also use it to manage your cables just like a cord organizer.
At present, Plug Power is during production process. The detailed price hasn’t been unveiled. If you’re interested, jump to Quirky official site for more details.