Energizer Recharge AAA NiMH Rechargeable Battery (4-Pack) Brand_Petmate or sledgehammer

or sledgehammer

The square underside of the head is self-locking to eliminate spinning and the need for a driving tool

Interconnectable with up to 18 devices

High-impact protection

Edging around foundations and retaining walls

Energizer Recharge AAA NiMH Rechargeable Battery (4-Pack) Brand_Petmate or sledgehammerCan be charged hundreds of times and will hold charge up to 1 year in storage Up to 5 year battery life when used under normal conditions Extended life composition infused with advanced technology minimizes both self discharge and natural aging effects Advanced manufacturing process ensures no quality defects leading to a reliable and consistent user experience over an extended time period