Amazon with TIGER HEAD HI WATT BATTERY HK CO LTD has the 2-Pack HW 9V NiMH 200mAh Rechargeable Batteries for $9.99 - $1 off coupon (check "Apply Coupon") - 5% off with Subscribe & Save (can cancel at any time) - $4 off with coupon code OTO49AZM at checkout = $4.49 with free shipping on $35+ or with Prime.