Greenworks 60v Battery Carry Caddy

Bigger Greenworks machines like their riding mowers typically require multiple batteries that you need to carry from wherever you charge them to the machine.  After precariously stacking batteries balanced against my chest and nearly dropping them for too long, I built a carrying caddy that holds pairs of batteries and can be joined up for carrying more than two.

For each pair of batteries, print one each of Handle and Greenworks60vTwoPack.  You can print the handle without supports if you print it sticking straight up, but I chose to print them lying down flat with supports under the tenon so that the battery weight wouldn't be pulling against layer lines.  The main carrier prints pointing up with the openings for the mortise joint on the top.

You'll need 4x M3x20 SHCS to pin the handles into the caddy.  They just thread into plastic, but since the screws are acting as pins, there shouldn't be any real force pulling against the threads.

If you want to join pairs together, you'll additionally need 2x M4 nut and 2x M4x10 BHCS.  Assemble each handle/caddy set first since the screw/pin locations will be blocked after they're connected.  Then insert a nut into the recessed spot on one caddy and bolt through from its neighbor.  

The handles have a ¼" hole which I used to run a piece of ¼" all-thread rod to join the two sets and add some strength.  I just hot glued the ends to hold the rod inside.  I think that was overkill honestly as the handles seem like they're strong enough without reinforcement.  

I'm not sure I'm going to leave mine attached as the weight of four batteries in one hand is a bit much.  A pair in each hand would be easier to carry.  Originally I'd though to make this joinable so I could add yet another set if I ever pick up the extra two batteries to max out my mower capacity, but carrying six batteries in one hand would be way too heavy to do comfortably.