Amazon has the EBL Rechargeable AAA Batteries 800mAh (8 Pack) with Smart Rapid Battery Charger with AC Wall Plug for AA AAA 9V Ni-MH Ni-CD Rechargeable Batteries
$11.69 – 10% coupon on page = $10.52
Note – charger does 9V in addition to standard AA AAA.
https://www.amazon.com/gp/product/B0842MXPFV