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Heltec Universal DIY Battery Holder For 18650 21700 AA AAA Cells, Multiple Types Battery Slots & Storage Boxes

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Full-Spec Battery Holder & Battery Box Series

Explore our complete selection of high-performance battery slots and enclosed battery boxes, designed for 18650, 21700, AA and AAA battery power supply scenarios.
From detachable pin-type battery slots with 1~4 cell options, flexible splice-type holders with omnidirectional assembly, to robust 3-string battery packs with parallel/serial circuit compatibility.
Every product is engineered with reinforced structure, fireproof shock-resistant shell, pre-wired leads, and optional protection boards & power switches. With stable spring contact and precise dimensional fit, they are ideal choices for micro energy storage, electronic DIY and custom battery pack projects.

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Heltec Pin-type Battery Holder Full Product Description

Product Overview

This is a high-quality customizable pin-type battery holder, universally compatible with 18650 and 21700 lithium battery cells. With optional 1/2/3/4 series slot configurations, it is perfectly designed for DIY battery pack assembly, PCB board integration, energy storage module building, electronic device power supply and custom battery system projects.

We provide two versions for all specifications: regular version and high-current enhanced version, fully meeting different daily low-power and heavy-load large-current application demands.

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Heltec 3-Cell Series/Parallel Battery Box Full Product Description

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Product Overview
This versatile DIY battery box is fully compatible with both18650 and 21700 flat-head lithium battery cells, supporting flexible 3-cell series and 3-cell parallel connection modes. Two optional versions are provided for diversified project demands: model with built-in overcharge & overdischarge protection (without power switch), and model with independent on-off switch (without built-in protection module).
Adopting high-strength fireproof PC thickened shell and durable nickel-plated elastic spring contacts, it ensures stable conductive connection, anti-rust performance and long service life. Pre-wired with standard red positive & black negative output leads for convenient wiring, it perfectly fits custom portable power supplies, DIY energy storage packs, electronic device power projects and all lithium battery assembly applications.

Heltec Splicing Type Battery Slot Full Product Description

Product Overview
This free-splicing battery holder is compatible with 21700, 18650, AA and AAA batteries, supporting 5-10A large current transmission.
With concave-convex interlocking structure, it realizes unlimited series & parallel assembly. Made of durable anti-drop PC+ABS material with high-conductivity terminals and complete accessory kits, it is ideal for DIY battery pack, electronic device and portable power projects.

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color

HT-B18650P, HT-B18650P2, HT-B18650P3, HT-B18650P4, HT-B21700P, HT-B21700P2, HT-B21700P3, HT-B21700P4, HT-B5AAS, HT-B7AAS, HT-B18650P3BMSC, HT-B18650P3SC, HT-B18650S3BMSC, HT-B18650S3SC, HT-B21700P3SC, HT-B21700P3BMSC, HT-B21700S3BMSC, HT-B21700S3SC, HT-B21700J, HT-B21700J2, HT-B21700J3, HT-B21700J4, HT-B18650J, HT-B18650J2, HT-B18650J3, HT-B18650J4, Pure Copper Battery Terminal Springs, 2 Pair, HT-B21700C, HT-B18650C

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