1 / 7LiTHELi U20BY09 20V 4.0Ah Battery Pack
The LiTHELi U20BY09 battery pack is listed as a 20V, 4.0Ah rechargeable lithium-ion replacement for U20 power tools. Its listing also describes USB-C charging for personal electronics, but the package contents are not specified.
At a glance
- Listed as a replacement battery for LiTHELi U20 tools.
- Product details specify 20 volts and 4 amp-hours.
- The feature description claims up to 45W output and a two-way USB-C port for charging electronics.
- The listing claims a 20,000mAh capacity and estimates up to 0.8 laptop, 1.8 phone, or 1.2 iPad charges, and 20 minutes of garden-tool operation.
Often bought together
Pros and cons
Pros
- Combines a listed U20 tool battery with a two-way USB-C port for charging compatible electronics.
- The 4 amp-hour capacity is explicitly stated in the product details.
Technical specifications
13 specifications| Brand | LiTHELi |
|---|---|
| Model | U20BY09 |
| Battery type | Lithium Ion |
|---|---|
| Capacity | 4 amp_hours |
| Voltage | 20 volts |
| Rechargeable | Rechargeable |
| Amperage | 4 A |
| USB-C output claim | up to 45W |
|---|---|
| USB-C port | two-way USB-C input/output port |
| Power-bank capacity claim | 20,000mAh |
| Recommended use | Indoor/Outdoor |
| Dimensions listed | 6.1 x 4.1 x 2 inches |
|---|---|
| Weight listed | 1.1 pounds |
What to know before buying
Listing details to confirm
The listing is inconsistent about battery count and capacity: product details say five lithium-ion batteries are included and specify 4 amp-hours, while the features describe a 20,000mAh U20 SUPER BATTERY. Confirm the selected product's exact configuration and whether it is the USB-C U-Battery Plus before buying. The listing does not provide an explicit package inventory.
Who is it for?
A good fit for
- Owners of LiTHELi U20 tools seeking a listed 20V replacement battery.
- Buyers interested in using a battery pack for compatible electronics through USB-C, after confirming this listing's exact configuration.
Less suited to
- Buyers who need a confirmed package inventory or verified USB-C capability for the exact selected battery.

Customer reviews on Amazon
- 5 stars
70% 70% - 4 stars
16% 16% - 3 stars
6% 6% - 2 stars
0% 0% - 1 star
8% 8%
Aggregate ratings lean positive, with most ratings in the five-star category, but a smaller portion are one-star and some are mid-range. Without written customer feedback, the ratings do not explain what buyers liked or disliked. They should not resolve the listing's uncertainty about whether this is the USB-C-capable configuration.
Frequently asked questions
Which tools is this battery listed for?
The listing describes it as a replacement for LiTHELi U20 power tools. It does not establish compatibility with other tool platforms.
Does it charge phones or laptops over USB-C?
The feature text claims a two-way USB-C input/output port and up to 45W output. Because the listing also describes differing battery configurations, confirm that the selected item includes this capability.
How many batteries are included?
The product details claim five lithium-ion batteries are included, but no explicit package inventory is supplied. The listing also describes a singular battery pack, so confirm the selected listing's contents.

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