# Internal laptop battery Lenovo 5B10W51861 39.3Wh Li‑Ion

**URL:** https://aio.lv/en/product--lenovo-5b10w51861--5995767
**Data updated:** 2026-02-12 14:19 (EET)
**Category:** Power tool batteries
**Manufacturer:** Lenovo
**Manufacturer code:** 5B10W51861
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Internal replacement laptop battery Lenovo 5B10W51861 with 39.3Wh capacity, Li‑Ion chemistry. Designed as an original-equivalent internal power module for compatible Lenovo notebooks, it restores battery runtime and supports mobile use, charging cycles and system power management. Suitable for users needing a direct battery replacement to recover portable operation and productivity.

## Long description

Internal laptop battery Lenovo 5B10W51861 39.3Wh Li‑Ion is an internal replacement power module intended for compatible Lenovo notebooks. This rechargeable lithium-ion battery restores portable runtime and integrates with system power management to support normal charging cycles and mobile operation. It serves as a direct replacement for worn or degraded internal batteries, allowing the laptop to operate away from AC power and maintain expected performance during everyday tasks.
Advantages
This internal battery provides a compact 39.3Wh capacity in a form factor designed to match the original equipment's physical and electrical specifications. Using Li‑Ion chemistry, it offers consistent discharge characteristics, reasonable energy density, and compatibility with standard laptop charging systems. The replacement unit helps recover battery life and reduces the need for frequent charging, enabling longer periods of untethered use without changing system settings or accessories.
Подходит для
Замена старой или изношенной внутренней батареи ноутбука
Восстановление автономной работы ноутбука
Техническое обслуживание и апгрейд корпоративных и домашних ноутбуков
Key specifications
Battery type: Lithium‑ion (Li‑Ion)
Nominal capacity: 39.3 Wh
Form factor: Internal laptop battery, designed for compatible Lenovo notebooks
Intended use: Rechargeable power source for mobile operation and system power management
How to use
Power down the laptop and disconnect all external power sources before beginning replacement. Remove the access panel or bottom cover following the device manufacturer’s service instructions, then disconnect the existing battery connector from the motherboard. Install the replacement battery in the same orientation and secure any retaining hardware or clips. Reconnect the battery cable, reassemble the chassis, and connect the AC adapter to perform an initial charge cycle. Allow the system to recognize the new battery and, if applicable, recalibrate battery reporting by charging to full and then discharging through normal use.
Usage recommendations
Use the replacement battery with the specified compatible Lenovo notebook models and adhere to the laptop manufacturer’s disassembly instructions. Avoid exposing the battery to extreme temperatures, direct moisture, or impacts. Charge and store the battery at moderate temperatures and follow safe disposal or recycling procedures for the removed battery.
Внимание: перед проведением работ убедитесь в совместимости батареи с конкретной моделью ноутбука и, при необходимости, обратитесь к официальной документации по обслуживанию.

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Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Lenovo products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Lenovo service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

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