---
product_id: 386882944
title: "XBERSTAR 18650 Battery Holder,12V 3S 7P Li-ion DIY Case Holder for 18650 Powerwall Battery Pack Spot Clamp (Black)"
brand: "xberstar"
price: "€ 22.67"
currency: EUR
in_stock: true
reviews_count: 13
category: "Xberstar"
url: https://www.desertcart.fi/products/386882944-xberstar-18650-battery-holder-12v-3s-7p-li-ion-diy
store_origin: FI
region: Finland
---

# Supports 12V 3S 7P configuration Holds 21 x 18650 cells Durable ABS plastic with spot clamp XBERSTAR 18650 Battery Holder,12V 3S 7P Li-ion DIY Case Holder for 18650 Powerwall Battery Pack Spot Clamp (Black)

**Brand:** xberstar
**Price:** € 22.67
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your DIY revolution with rock-solid battery packs!

## Quick Answers

- **What is this?** XBERSTAR 18650 Battery Holder,12V 3S 7P Li-ion DIY Case Holder for 18650 Powerwall Battery Pack Spot Clamp (Black) by xberstar
- **How much does it cost?** € 22.67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/386882944-xberstar-18650-battery-holder-12v-3s-7p-li-ion-diy)

## Best For

- xberstar enthusiasts

## Why This Product

- Trusted xberstar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Stable 12V Output:** 3 series, 7 parallel design ensures reliable and consistent power delivery.
- • **Massive 21-Cell Capacity:** Build powerful battery packs with ease—perfect for high-demand DIY projects.
- • **Robust ABS Plastic Frame:** Lightweight yet durable housing protects your pack while keeping it sleek and professional.
- • **Tool-Free Spot Clamp Connection:** Say goodbye to messy adhesives—secure, maintain, and swap batteries effortlessly.
- • **Plug-and-Play Positive/Negative Shrapnel:** Simplifies wiring with direct line connections for faster assembly and maintenance.

## Overview

The XBERSTAR 18650 Battery Holder is a high-capacity, durable ABS plastic case designed to securely hold 21 lithium-ion 18650 cells in a 12V 3S 7P configuration. Featuring spot clamp technology and integrated positive/negative shrapnel, it enables easy, adhesive-free assembly and maintenance of custom battery packs, ideal for powerwalls, UPS conversions, and off-grid energy solutions.

## Description

desertcart.com: XBERSTAR 18650 Battery Holder,12V 3S 7P Li-ion DIY Case Holder for 18650 Powerwall Battery Pack Spot Clamp (Black) : Electronics

Review: Making batteries - I have converted my UPS batteries to lithium with these. Pretty straightforward to build, doesn’t forget a BMS! It all fits in the battery box and silicone glued together. Done with the lead acid batteries!!!
Review: Works great - Made myself a 21P battery and added a USB converter. Works perfectly as a power backup for my cabins WiFi and camera system. Would buy again in a heartbeat.

## Features

- Type : for 18650 Powerwall Battery Pack Spot Clamp
- Material:ABS plastic, convenient combination, fixed specifications, and free combination
- Can hold 21 pcs 18650,Makes your battery pack Solid and Reliable.This kit does not include batteries
- The outer box cover of the product contains positive and negative shrapnel, which can be linked directly with the line
- With professional battery holder to replace the traditional general adhesive, which would brings convenient combination and more firm connection, as well as brings convenient maintenance of the battery.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09G9WMPCY |
| Customer Reviews | 4.2 4.2 out of 5 stars (66) |
| Date First Available | September 15, 2021 |
| Item Weight | 5.6 ounces |
| Manufacturer | XBERSTAR |
| Package Dimensions | 5.94 x 3.74 x 2.6 inches |

## Product Details

- **Battery Capacity:** 12 Volts
- **Battery Cell Composition:** Lithium Ion
- **Brand:** XBERSTAR
- **Recommended Uses For Product:** Power Tool
- **Unit Count:** 1 Count

## Images

![XBERSTAR 18650 Battery Holder,12V 3S 7P Li-ion DIY Case Holder for 18650 Powerwall Battery Pack Spot Clamp (Black) - Image 1](https://m.media-amazon.com/images/I/61w0hA2zqOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Making batteries
*by S***N on January 19, 2026*

I have converted my UPS batteries to lithium with these. Pretty straightforward to build, doesn’t forget a BMS! It all fits in the battery box and silicone glued together. Done with the lead acid batteries!!!

### ⭐⭐⭐⭐⭐ Works great
*by P***A on February 23, 2022*

Made myself a 21P battery and added a USB converter. Works perfectly as a power backup for my cabins WiFi and camera system. Would buy again in a heartbeat.

### ⭐⭐⭐⭐ One out of 4 had a chip in the lid. Not worth sending back.
*by T***R on April 21, 2023*

For the most part okay for the price. But one had a chipped corner in the lid. Will keep it and use it. Not worth sending it back.

## Frequently Bought Together

- XBERSTAR 18650 Battery Holder,12V 3S 7P Li-ion DIY Case Holder for 18650 Powerwall Battery Pack Spot Clamp (Black)
- XBERSTAR Li-Ion Battery Storage Box 3x7 18650 Holder for DIY Battery Special Plastic DIY kit, Black (Black)
- Li-Ion Battery Storage 3x7 18650 Holder for Uninterrupted Power Supply UPS DIY Battery Special Plastic DIY kit (Bracket Set Without case)

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**Shop now:** [https://www.desertcart.fi/products/386882944-xberstar-18650-battery-holder-12v-3s-7p-li-ion-diy](https://www.desertcart.fi/products/386882944-xberstar-18650-battery-holder-12v-3s-7p-li-ion-diy)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-25*