# OHYES BAT RBL08L 40V 4.0Ah Replacement Battery

OHYES BAT RBL08L is a 40V, 4.0Ah lithium-ion replacement battery listed for compatible Black & Decker 40V tools. Its stated compatibility spans several tool models, but confirm your exact battery and charger model before buying.

- [Original product page](https://best-deals.pro/product/ohyes-bat-rbl08l-40v-4ah-replacement-battery)
- [View offer](https://best-deals.pro/visit/ohyes-bat-rbl08l-40v-4ah-replacement-battery)
- Market: US
- Language: en-US
- Currency: USD
- Brand: OHYES BAT
- Model: RBL08L
- Price: 32.99 USD
- Previous price: 38.81 USD
- Discount: 15%
- Price checked: 2026-11-14T07:05:53.123Z
- Rating: 4.4 / 5
- Reviews: 189

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Replacement battery for selected Black & Decker 40V cordless tools.
- The listing states 4.0Ah capacity and lithium-ion chemistry.
- An integrated LED indicator is described for checking battery charge level.
- The manufacturer claims protection against overcharging, overheating, and short circuits.

## Pros

- The 4.0Ah capacity and listed 40V platform may suit owners replacing a compatible battery without changing tool systems.
- The charge-level LED gives a direct way to check the battery's indicated charge.
- The listing names compatible battery, tool, and charger model numbers to help narrow fitment.

## Specifications

### Identity
- Brand: OHYES BAT
- Model: RBL08L
### Battery
- Voltage: 40V
- Capacity: 4000mAh
- Battery type: Lithium-ion
- Output voltage: 40 volts
- Amperage: 3 A
- Color: Orange
### Compatibility and dimensions
- Listed compatible battery and tool models: LBXR36 LBX2040 LBX2540 LBX1540 LBXR2036 LBXR36-2 LST540 LCS1240 LST136W
- Listed charger models: LCS36 LCS40
- Dimensions listed: 10"D x 10"W x 10"H
### Support
- Warranty description: 1 year

## Before you buy

- The listing details are inconsistent about battery capacity, describing 4.0Ah in the title and 4000mAh in the feature text, which are equivalent, but its input-voltage field is malformed and the listed 3 A amperage is not explained. The 10-inch dimensions are listed without clarification of how they apply to this battery. Compatibility and charging suitability are manufacturer claims, so verify your exact tool and charger models before purchase.

## A good fit for

- Owners of listed Black & Decker 40V tools who need a replacement battery and can confirm the exact model match.
- Buyers who value an onboard charge-level indicator.

## Less suited to

- Owners of tools outside the listed Black & Decker 40V compatibility range.
- Buyers who need independently verified runtime, capacity, or fitment information.

## Customer feedback

Aggregate ratings lean positive overall, but a smaller share of ratings are low, so they do not establish consistent performance or explain individual experiences. For a replacement battery, buyers should weigh that limited signal alongside the stated capacity and verify compatibility with their particular tool and charger.

## Frequently asked questions

### Which tools is the RBL08L listed to fit?
The listing names several Black & Decker 40V battery and tool models, including LBX2040, LBXR36, LST540, and LCS1240. Confirm your exact model before ordering.
### What capacity does the listing specify?
It states 4.0Ah in the title and 4000mAh in the product details. These are equivalent capacity expressions.
### Does it include a charger?
The supplied package details list a battery and user manual, not a charger. The product is described as compatible with LCS36 and LCS40 chargers.

## Alternative options

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- [DTK Replacement for Kobalt 40V Battery 5600mAh \| KB240-06 KB2540C-06 KB240-03 KB440-03 KM 2041B-06, KPM1040A-03, KM-1640-06, KM 4040-06, Cordless Power Tool Battery](https://best-deals.pro/visit/ohyes-bat-rbl08l-40v-4ah-replacement-battery)
- [DTK Replacement for Kobalt 40V Battery 6000mAh KPM1040A-03, KM-1640-06, KM 4040-06, Cordless Power Tool Batteries 2 Packs](https://best-deals.pro/visit/ohyes-bat-rbl08l-40v-4ah-replacement-battery)
- [DTK 2 Packs Battery Replacement for Ryobi 40V Battery 6.2Ah OP4040 OP4026 OP4030 OP4050 OP4060A](https://best-deals.pro/visit/ohyes-bat-rbl08l-40v-4ah-replacement-battery)
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## Add-ons

- [10 Pack Weed Eater String Compatible with Black+Decker, AF-100 0.065" 240ft \| Automatic Feed, Perfect Fit, Weed Eater Spool, String Trimmer Replacement Spool for Black&Decker, 8 Spool+2 Cap+2 Spring](https://best-deals.pro/visit/ohyes-bat-rbl08l-40v-4ah-replacement-battery)
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## Images

![OHYES BAT RBL08L 40V 4.0Ah Replacement Battery — 1](https://best-deals.pro/i/B-eMrk-aQX6rfyPhA2Ahaw-XxxzHgzlLjNU9THBkocXLItTWi974zWVkMrz8nnIIBPKfbKxO-YPPB7iHNR9GSbnZeBjaM2Otp7eicPj64LTncmJegP0QdbVh.jpg)

![OHYES BAT RBL08L 40V 4.0Ah Replacement Battery — 2](https://best-deals.pro/i/tc-nvuNAAvclrIWZ0XimjxFC4EX-zBVdsl9jPDsn6gSBltGp8Kq7srD4MSwOWBOo2FdIPUV3XrKOSZPZV5tjRfLeAUVFD9h7roeLs2NACSaqaHEa5YQHaeGn.jpg)

![OHYES BAT RBL08L 40V 4.0Ah Replacement Battery — 3](https://best-deals.pro/i/hjzM0vvw1WLPrANnxjpQO3i98AaKfuTwz0yk-V3k79vFsD8j2s3XmVlihu_q84jaEibaVaW6cGkuA63Uvb7zUuO1CZ-FbRht25RxK1FEgCdVrUvYjPryo7c5.jpg)

![OHYES BAT RBL08L 40V 4.0Ah Replacement Battery — 4](https://best-deals.pro/i/UecvyIIsZiufVK0q8EG9JoeYoa6jz1UTbzESS7l540AnbItoy00-TFrGZAR8KA32ZeT3SixLfpMSciH2EzZP9el7NQhGh6CdK2rPACWk174WlpqlcoEMdwYY.jpg)

![OHYES BAT RBL08L 40V 4.0Ah Replacement Battery — 5](https://best-deals.pro/i/vtZvULqkLGEORoBN4K98IoEj5a4ThHLvYUI_w6k597j372zuLEQySDKHab8YWL_BZrW2xldxptu_6mfmX27Dk0PjLYXr4jhBCr1WUuakinhl5Z24uEbRtTQt.jpg)

![OHYES BAT RBL08L 40V 4.0Ah Replacement Battery — 6](https://best-deals.pro/i/yMlvdloG7VHgJXrJoBjCxNo3_v4zJNBfAQD2pg46ZiOzHqTu2ugmakGpi-fdaq5kRfwnAolO6jtQx9oDPb8xiifl8DoBBvoz8BcXpKUhXnskz9qMw8khQwU1.jpg)

![OHYES BAT RBL08L 40V 4.0Ah Replacement Battery — 7](https://best-deals.pro/i/bmJr6p3giQTpytDvnUzspSrY6-WDs2AEyKD_YwMdXMt7nVTw_h3inZbu6O65j5Xbp9IBZIwYr4TmSJVspyVnkWjqVXM4207i3owH-QoXBExkCxAMEM1x75A7.jpg)