These are great and I have had zero issues

https://amzn.to/3ImOhLm

Efficient Charging:Equipped with 4 ports, each port is 2.0A, this 20V battery charger can charge 4 batteries at the same time. Reduce charging time and improve work efficiency. Output: 20V MAX 2.0A Input: 100V~240V 50/60Hz.
Dual USB Charge Ports: The 4-port battery charger compatible with Dewalt battery come with dual USB ports, perfect fits for USB fan, tablet, cellphone, power bank, speakers, very convenient charging for many types of devices silmultaneous.
Wide Compatibility: The DCB104 Battery Charger Compatible with Dewalt 12V 20V MAX Li-ion DCB206 DCB205 DCB204 DCB201 DCB120 DCB127 Battery, Fast Charger Replace for DCB112 DCB115 DCB118 DCB107 DCB105 DCB102 Charger.
Safe & Reliable:Diagnostics with LED indicator displays the battery charge status. The built-in safeguards (built-in chip and cooling fin) can monitor each battery and are going to protect against overcharging, overloading, overheating and short circuiting.
Friendly Consumer Sevice:30days Free return and replacement. For any question, click "Ask a question" on our storefront, or click "contact seller" in "Your Order" options.