Heltec 3.7V 3000mAh Li-Polymer Battery (PL103665) for Heltec V3, V4, T114 V2 and Wireless Tracker V2

Genuine Heltec 3000mAh Li-Polymer battery, purpose-built for Heltec LoRa boards. This is the original Heltec Automation battery designed to fit directly into the housings of the Heltec WiFi LoRa 32 V3, V4, T114 V2, and Wireless Tracker V2. Correct connector, correct dimensions, correct voltage, and a built-in protection circuit for safe long-term use.

If you are building a solar node, extending the runtime of your handheld, or replacing an ageing battery in your existing Heltec device, this is the drop-in fit that just works. No adapters, no soldering, no guesswork.

Compatible Devices

Not Compatible With RAKwireless Devices

This battery is specifically designed for Heltec devices with a PH 2.0 connector. It does not fit RAKwireless devices such as the WisMesh Pocket V2, WisMesh Tag, or WisMesh Repeater Mini. RAKwireless products use a different connector pitch and different battery form factor. If you need a replacement or spare battery for a RAKwireless device, contact us and we will help you find the correct part.

Key Features

• 3000mAh capacity: significantly extends runtime on any Heltec board. On a Heltec V4 with typical Meshtastic settings, this powers the device for multiple days of use.
• 3.7V nominal voltage (4.2V fully charged): matches the required input range for Heltec's onboard battery management circuits.
• PH 2.0 connector: pre-terminated with the exact connector used on Heltec boards. No soldering, no crimping, no adapters.
• Built-in protection circuit: guards against overcharging, over-discharging, overcurrent, and short circuits, extending battery life and preventing damage to your device.
• Compact form factor: 10 x 36 x 68 mm, designed to fit inside the original Heltec device housings without modification.
• Wide operating temperature: works reliably from -20°C to +60°C, suitable for outdoor solar node deployments and portable use across seasons.
• Manufacturer-original: supplied by Heltec Automation, not a third-party clone. Same quality control as the batteries used in Heltec's own developer kits.

Common Use Cases

• Extended runtime for portable Meshtastic or MeshCore nodes: the higher capacity of 3000mAh gives you multiple days of standalone operation on a fully charged Heltec V3 or V4.
• Solar node builds: pair with a small solar panel connected to the V4's dedicated solar input, and you have an autonomous outdoor node.
• Replacement for ageing batteries: LiPo batteries degrade over years of use. Swap out the original battery in your Heltec device to restore full capacity.
• Spare battery for field use: keep a charged spare with your kit for extended trips, festivals, or emergencies.

Specs

• Brand: Heltec Automation
• Model: PL103665
• Chemistry: Li-Polymer (LiPo)
• Nominal voltage: 3.7V
• Charged voltage: 4.2V
• Capacity: 3000mAh (11.1 Wh)
• Connector: PH 2.0 (JST PH 2.0 mm pitch)
• Dimensions: 10 x 36 x 68 mm
• Weight: approximately 55 grams
• Operating temperature: -20°C to +60°C
• Protection: Overcharge, over-discharge, overcurrent, short circuit
• Certifications: CE, RoHS compliant

What's in the Box

• 1 × Heltec 3000mAh Li-Polymer battery with PH 2.0 connector, pre-terminated and ready to plug in.

Safety Notice

Lithium polymer batteries require correct handling. Charge only via the device's onboard charging circuit or a compatible LiPo charger. Do not puncture, short circuit, expose to fire, or leave in extreme temperatures. Store between +10°C and +25°C at approximately 50 percent charge for maximum longevity when not in use. Dispose of used batteries at your local battery recycling point, in accordance with EU battery regulations.

Pair It With

• Heltec WiFi LoRa 32 V3 for a complete portable Meshtastic build.
• Heltec WiFi LoRa 32 V4 for the higher power version, plus solar input for autonomous outdoor operation.
• Heltec Wireless Tracker V2 for GPS-enabled portable use.
• Flexible LoRa Whip Antenna to complete your portable build with better range.