iOptron Lithium-Poly Battery (3.7V) 3329

Power your portable mount with confidence using the iOptron Lithium-Poly Rechargeable Battery (#3329). Specifically designed for iOptron devices such as the SkyGuider Pro and SkyTracker Pro, this slim, lightweight battery ensures consistent performance for your nighttime observing or imaging sessions.

Whether you’re in the backyard or deep under dark skies, a fresh Li-Poly battery keeps your tracker running smoothly—without the hassle of external power banks or heavy cables.

Made for the Field

The #3329 battery is a direct factory replacement for several iOptron portable mounts. It features a 3.7V nominal output, with peak voltage at 4.2V, and a capacity of 2000mAh—plenty of runtime for an evening of wide-field astrophotography.

The compact footprint and internal placement help maintain your mount’s balance, portability, and cable-free convenience.

Built-In Safety and Reliability

To help protect both the battery and your equipment, this unit includes integrated circuit protection against overcharging and over-discharging. It’s engineered to maintain a stable output and preserve battery longevity across repeated charging cycles.

Thanks to its no-memory design, you can top it off whenever needed—perfect for grab-and-go sessions or unpredictable weather windows.

Specifications

• Battery Type: Lithium-Polymer (Li-Poly)

• Capacity: 2000mAh

• Nominal Voltage: 3.7V

• Peak Charge Voltage: 4.2V

• Charging Cutoff: Less than 4.2V

• Dimensions: ~8.5mm x 34mm x 51mm

• Weight: ~32g (1.1 oz)

• Warranty: 30-day limited manufacturer warranty

• Compatible Devices: iOptron SkyGuider Pro, SkyTracker Pro, and other select iOptron devices (check fit before ordering)

Included Items

• iOptron Lithium-Poly Battery (3.7V) – Model 3329

• Pre-installed connector for compatible iOptron mounts

Observing Tip

Planning a long imaging session? While one fully charged battery will usually last through several hours of operation, it's a good idea to keep a spare on hand—especially in colder weather, which can reduce effective runtime. Store extras in a warm pocket until needed.