One option for NiMH/NiCd is Opus BM-100, review by HKJ. Available at Gearbest, you can try to ask them for coupon code, IIrc once they sell it around USD 17 - USD 18. Can find at Aliexpress or Ebay too.
One option for NiMH/NiCd is Opus BM-100, review by HKJ. Available at Gearbest, you can try to ask them for coupon code, IIrc once they sell it around USD 17 - USD 18. Can find at Aliexpress or Ebay too.