Kastar 3-Pack Ei-D-Li1 Battery and LTD2 USB Charger Replacement - Dual

In this review of the Kastar 3-Pack Ei-D-Li1 Battery and LTD2 USB Charger Replacement, the bottom line is simple: it is a practical, budget-friendly solution for users who need reliable spare power for legacy Trimble, Pentax, HP and compatible camera or GNSS devices. The reviewer found the kit most useful for field technicians and photographers who need two batteries charged concurrently and want the flexibility of Micro-USB or Type-C input. The most compelling reason to buy is the combination of a 2600mAh 7.4V Lithium-Ion battery capacity and an intelligent dual USB charger that reports charging status.

Key Features

• Battery Capacity: Each battery delivers 2600mAh at 7.4V, providing longer runtime compared with many factory spares for older equipment.
• Dual Charging: The included LTD2 USB charger can charge two batteries at the same time, which reduces downtime in the field.
• Flexible Inputs: Multiple charging options include Micro-USB and Type-C inputs and the charger accepts 5V 2-3A, so it works with common mobile power sources.
• Swap Plate Design: The charger plate can be changed to fit different battery contacts, making it adaptable to several compatible models.
• Intelligent LED: The LED indicators show charging status and battery capacity so users can tell when a battery is ready without guessing.

Who It's For

This kit is best for field engineers, surveyors, and owners of legacy Trimble R-series and MT1000 units who need hot spares and want a compact, USB-powered charger to keep devices running between jobs. Photographers and owners of older Pentax and HP camera models that use Ei-D-Li1 style batteries will also find the extra batteries and charger convenient for travel and shoots.

It is less appropriate for users who require factory-original batteries with manufacturer warranty validation or those who need significantly higher capacity cells than the supplied 2600mAh rating. If you need an integrated single-vendor support contract for critical equipment, consider OEM battery options instead.

Pros & Cons

Pros

• Includes three 7.4V 2600mAh batteries, providing ample spare power for long field days.
• Dual USB charger can charge two batteries simultaneously, saving time between uses.
• Charger supports both Micro-USB and Type-C inputs and runs from common 5V power sources for portability.

Cons

• The batteries are third-party replacements, so users seeking OEM-branded cells may prefer original manufacturer parts.
• The charger output is limited to 800mA per slot, so charging is not as fast as some high-current dedicated chargers.

Specifications

Brand	Kastar
Battery Type	Lithium-Ion
Battery Voltage	7.4V
Battery Capacity	2600mAh
Charger Input	5V 2-3A (15W)
Charger Output	8.4V 800mA x1 or 800mA x2
Connector Options	Micro-USB input and Type-C input (Micro USB cable included)

Our Verdict

The Kastar 3-Pack Ei-D-Li1 and LTD2 USB charger is a sensible, cost-effective choice for technicians and photographers who need dependable spares and a portable dual charger. It offers good capacity, flexible charging inputs, and helpful LED indicators, making it a strong value for anyone maintaining older Trimble, Pentax, or compatible devices who does not require OEM parts.

Frequently Asked Questions

Will these batteries work with Trimble R8 and R6 units?
Yes, the pack lists compatibility with Trimble R8, R6, R4 and several other Trimble models that use Ei-D-Li1 style batteries.

Can I charge both batteries at the same time from a power bank?
Yes, the LTD2 charger accepts 5V input and can charge two batteries simultaneously when supplied with adequate current from a 5V 2-3A power bank or adapter.

Does the kit include a USB cable?
It includes a Micro-USB cable and the charger also supports Type-C input for versatile charging options.