# CMOS battery for Lenovo laptops, model 81N8 (MPN 5B10S34064)

**URL:** https://aio.lv/en/product--lenovo-5b10s34064--5079958
**Data updated:** 2026-02-12 14:18 (EET)
**Category:** Batteries
**Manufacturer:** Lenovo
**Manufacturer code:** 5B10S34064
**EAN:** 5704174694809
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 30.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 25.20 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lenovo-5b10s34064--5079958

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Replacement CMOS battery compatible with Lenovo laptops, model 81N8 (MPN 5B10S34064). Designed to maintain BIOS settings and system clock when the main battery is disconnected. Ideal for repairing or servicing Lenovo notebooks that use this specific CMOS module. Provides reliable backup power for BIOS configuration retention and stable boot behaviour.

## Long description

Replacement CMOS battery compatible with Lenovo laptops, model 81N8. This CMOS module is designed to maintain BIOS settings and the system clock when the main battery is disconnected or removed. It serves as a direct replacement for the onboard backup power cell used by compatible Lenovo notebooks and helps preserve BIOS configuration, date/time, and boot settings during servicing or battery swaps.
Advantages
The CMOS battery provides stable backup power to retain BIOS settings and the real-time clock, reducing the need to reconfigure system parameters after power loss. Its compact design enables easy installation in supported Lenovo laptop models. The replacement module helps restore normal boot behaviour in systems where the original backup battery has failed, supporting consistent system timekeeping and hardware configuration retention.
Suitable for
 Repairing or refurbishing Lenovo laptops that use the 81N8 CMOS module
 Maintaining BIOS settings and system clock during main battery removal
 Preventing boot errors and configuration resets after power loss
 Service centers and technicians performing motherboard-level maintenance
Key specifications
 Form factor: dedicated laptop CMOS module designed for internal installation
 Purpose: backup power for BIOS/CMOS settings and real-time clock
 Compatibility: designed to fit specific Lenovo notebook models that accept the 81N8 module
 Installation: internal connector suitable for motherboard CMOS socket used by compatible Lenovo units
 Expected function: preserves BIOS configuration and system time when main power is removed
How to use
Power down the laptop, disconnect the main battery and external power, and ground yourself to avoid electrostatic discharge. Access the motherboard following the manufacturer service manual or a trusted disassembly guide for your Lenovo model. Locate the existing CMOS module and carefully disconnect it from its connector, then connect the replacement module, ensuring proper seating and orientation. Reassemble the laptop, reconnect the main battery and power on the system to verify BIOS settings and system clock. If necessary, enter BIOS setup to confirm or reapply preferred configuration options.
Usage recommendations
Handle the CMOS module with care and avoid touching connector pins. Use official service documentation for your Lenovo model to ensure correct removal and installation. If uncertain about compatibility or the disassembly process, consult a qualified technician to prevent damage to the motherboard or other components.

## FAQ

### How much does the Lenovo CMOS battery 81N8 (5B10S34064) cost, and is it available for purchase?

The price is 30.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

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

## Image

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