A clip in battery converter for 12" and 16" STACYC bikes to run Makita 2Ah 18V batteries. The adapter is cheaper than buying new batteries if you already use Makita for your tools. No visible wires. No cutting or hacking up the frame to run the batteries. Fits Makita BL 1820B, BL 1820B-2 batteries. Makita batteries have a +/-25 minute charge time so your rider is back on the track fast.
$175 for 1 - 4 Ah battery vs $40 Makita Battery and $76 for the adapter ($106 for the first and $40 for every battery after)