# Rechargeable Laptop Battery Dell 21X15 42Wh 3-cell Lithium Sanyo for compatible Dell models

**URL:** https://aio.lv/en/product--dell-21x15--3684031
**Data updated:** 2026-02-12 09:57 (EET)
**Category:** Portable Device Batteries
**Manufacturer:** Dell
**Manufacturer code:** 21X15
**EAN:** 5704174266822
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 88.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 73.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dell-21x15--3684031

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Replacement rechargeable laptop battery Dell 21X15 with 42Wh capacity and 3-cell lithium chemistry (Sanyo cells). Designed as a compatible power source for supported Dell notebooks, it restores portable operation, provides several hours of runtime depending on usage, and enables mobile productivity and travel. Ideal for users needing a direct battery replacement to regain battery-backed operation.

## Long description

Rechargeable Laptop Battery Dell 21X15 42Wh 3-cell Lithium Sanyo for compatible Dell models is a replacement power pack designed to restore portable operation for supported Dell notebooks. With a nominal energy capacity of 42Wh and three lithium cells from Sanyo, this battery supplies steady power to enable several hours of runtime depending on system configuration, workload and power settings. The unit is intended as a direct swap for compatible laptop models to recover battery-backed functionality and mobility.
Advantages
This replacement battery offers a balance between capacity and compact size, providing sufficient runtime for everyday tasks while maintaining compatibility with the original device form factor. Using Sanyo lithium cells ensures reliable charge and discharge performance and predictable energy delivery. The battery is rechargeable and designed for easy installation in compatible Dell notebooks, allowing users to quickly regain mobile usage without modifying the laptop.
Suitable for
Replacing a worn or failed internal battery in compatible Dell laptops
Extending mobile runtime for office work, web browsing and video playback
Keeping a secondary battery for travel or on-the-go use
Maintenance and repair tasks where restoring original battery-backed operation is required
Key specifications
Battery type: Lithium-ion (3-cell)
Nominal energy: 42 Wh
Cell manufacturer: Sanyo
Rechargeable: Yes
Physical format: Internal laptop battery compatible with specified Dell notebook form factor
Typical runtime: Several hours depending on system configuration and usage
How to use
Power down the laptop and disconnect any external power source before starting. Remove the old battery following the laptop manufacturer’s service instructions or user manual, then insert the replacement battery into the compartment until it locks into place. Reconnect AC power and allow the new battery to reach a full charge before first use for optimal calibration. Monitor battery status using the operating system’s power indicator and battery management tools.
Usage recommendations
For longer battery life, avoid deep discharges, keep the laptop and battery in a cool, dry environment, and update system power management settings. Calibrate occasionally by charging to full and then discharging to a moderate level. Dispose of the old battery according to local electronic waste regulations and do not expose the battery to high heat, puncture, or water.

## FAQ

### How much does the Laptop Battery Dell 21X15 42Wh cost, and is it available for purchase?

The price is 88.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 01.07.2026 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 Dell 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 Dell 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

https://aio.lv/img/cache/product/3684031/59846319_large.webp