Generic 20V Battery Charger for Hyper Tough 20V Max — 0.7A Slow Replacement Charger, ACG318W1U Equivalent

The WETOOLPLUS 20V 0.7A Battery Charger is a slow, OEM-equivalent replacement built to safely recharge Hyper Tough 20V Max lithium-ion packs while minimizing heat and preserving battery life.

Lost or damaged your Hyper Tough slow charger? This WETOOLPLUS replacement (model matching ACG318W1U) reproduces the original low-current charging behavior so your 20V packs receive a steady, gentle charge. It’s designed specifically for Hyper Tough 20V Max lithium-ion batteries and offers a budget-friendly alternative without sacrificing protective circuitry or clear status feedback.

How does a 0.7A slow charger benefit my battery compared with high-speed chargers?

Low-current charging reduces heat buildup inside lithium-ion cells, which helps slow capacity loss over time. Rather than forcing a rapid replenishment, this charger delivers a controlled current that’s ideal for overnight top-ups and routine maintenance charging.

• Gentle 0.7A charge lowers internal temperature during charge cycles.
• Reduces long-term wear and capacity fade of 2.0Ah–4.0Ah packs.
• Better suited for overnight charging and storage preparation.

Which Hyper Tough batteries and charger models are compatible?

This unit is engineered to match the Hyper Tough 20V Max battery family and works with the original charger model ACG318W1U. Check the battery label before buying to make sure you have one of the supported pack part numbers.

• Compatible charger model: ACG318W1U equivalent.
• Works with battery part numbers HT21-401-003-10, HT21-401-003-11.
• Also fits HY5601050516015 and ABP1820HDW battery packs.
• Not compatible with 12V, 40V systems, or other brands—verify the pack label.

How long will charging take and how will I know when it’s done?

Because this charger intentionally uses a lower current, expect longer charge times: roughly three hours for a 2.0Ah pack and about six hours for a 4.0Ah pack. The integrated LED indicators remove guesswork by showing charging status at a glance.

• Approx. 3 hours for 2.0Ah batteries.
• Approx. 6 hours for 4.0Ah batteries.
• Solid red LED = charging; solid green LED = fully charged.

What safety features and protections are built in?

The charger includes protective electronics typically found in OEM units to guard both the charger and battery during normal operation. Once a battery is full, the charger transitions to a low-current trickle mode to prevent overcharge while keeping the pack ready for use.

• Over-current and over-voltage protection circuits included.
• Short-circuit protection safeguards against faults.
• Automatic switch to trickle mode after full charge.
• Designed to minimize heat and maintain battery integrity.

Who is this for? If you own Hyper Tough 20V Max tools and want a reliable, wallet-friendly replacement for a slow OEM charger, this WETOOLPLUS 20V 0.7A unit is a practical choice. It’s aimed at DIYers, trade users, and anyone who prefers safe, low-heat overnight charging over rapid top-ups—just verify the battery part number before ordering to ensure compatibility. The package includes one replacement charger and is backed by a 30-day money-back guarantee plus customer support for fit or performance questions.