# CMOS battery Lenovo 81N7 (model 5B10S34063) for motherboard real-time clock and BIOS settings backup

**URL:** https://aio.lv/en/product--lenovo-5b10s34063--5094462
**Data updated:** 2026-02-12 14:18 (EET)
**Category:** Batteries
**Manufacturer:** Lenovo
**Manufacturer code:** 5B10S34063
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lenovo-5b10s34063--5094462

## 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

Lenovo CMOS battery 81N7 (MPN 5B10S34063) is a motherboard backup battery designed to supply power to the real-time clock and preserve BIOS/UEFI settings when the main power is off. Compatible with systems specified by Lenovo for this part number, it is intended for replacing depleted CMOS cells to restore date/time accuracy and stored firmware settings, ensuring stable boot and hardware configuration retention.

## Long description

Lenovo CMOS battery 81N7 is a replacement motherboard backup battery designed to provide continuous power to the real-time clock and preserve BIOS/UEFI settings when the primary power source is disconnected. Intended for systems that accept this Lenovo part, the battery restores and maintains date/time accuracy and stored firmware configuration so the system can retain hardware settings and boot reliably after power loss.
Advantages
This CMOS battery offers a compact form factor and a stable voltage output suitable for motherboard backup of clock and BIOS settings. It replaces depleted CMOS cells to recover lost timekeeping and configuration data, reducing the need for repeated manual BIOS setup after power interruptions. As an original-equivalent component specified for compatible Lenovo systems, it is designed for straightforward installation and reliable long-term retention of firmware parameters.
Suitable for
Replacing a depleted motherboard CMOS battery to restore system time and BIOS settings
Maintaining BIOS/UEFI configuration on desktop or laptop systems that accept this Lenovo part
Repair or maintenance of systems showing CMOS-related errors or incorrect system time
Key specifications
Function: motherboard backup power for real-time clock and BIOS/UEFI settings
Form factor: compact coin-cell style designed for motherboard installation
Typical output: nominal voltage appropriate for CMOS backup (commonly 3 V in similar cells)
Expected lifetime: long shelf life and multi-year service when installed under normal operating conditions
Compatibility: designed for systems specified to accept this Lenovo replacement battery
How to use
Power down the computer, disconnect it from mains and, if applicable, remove the main battery before replacing the CMOS battery. Locate the existing CMOS cell on the motherboard, gently release it from its holder and insert the replacement with correct polarity. Reassemble the system, reconnect power and start the computer. Enter BIOS/UEFI settings if necessary to confirm date/time and saved configuration; adjust settings if they were reset during battery replacement.
Usage recommendations
Use only the compatible battery type specified for your Lenovo system. Handle the battery with care to avoid shorting terminals, and dispose of depleted batteries following local regulations for battery recycling. If you are unsure about the replacement procedure, consult the system’s service manual or a qualified technician to avoid damage to the motherboard.

## FAQ

### How much does the Lenovo CMOS battery 81N7 (5B10S34063) cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 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: Bank transfer. 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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