Kastar 4-Pack Ei-D-Li1 Battery and AC Wall Charger - Spare Power Pack

In this review the Kastar 4-Pack Ei-D-Li1 Battery and AC Wall Charger is considered for photographers and surveyors who need multiple replacements or extended field time. The bottom line: this pack is for users of older Pentax, Trimble, HP and compatible models who want a straightforward, higher-capacity replacement battery option and a compact charger for travel. The inclusion of four 2600mAh lithium-ion cells plus an AC charger makes it a practical buy for anyone tired of swapping single cells mid-shoot or mid-survey.

Key Features

• High capacity: Each lithium-ion battery provides 2600mAh at 7.4V, extending runtime compared with many original single-cell packs.
• Universal compatibility: Designed to work with Pentax D-Li1, Ei-D-Li1 and listed Trimble and HP models, making it useful for legacy cameras and GPS units.
• Travel-friendly charger: The included AC wall charger has a foldable flat pin that makes storage and packing easier for trips.
• Simple charging indicators: An LED shows red while charging and green when on standby or fully charged so you can monitor status at a glance.
• Wide input range: The charger accepts AC 100~240V 50~60Hz, so it works in most international mains without a voltage converter (adapter plug may be required).

Who It's For

This kit is best for photographers, field technicians, and survey professionals who use older Pentax cameras, Trimble GPS units, or the HP PhotoSmart models listed and need multiple spare batteries to keep devices running across long shoots or job days. The four-battery bundle reduces downtime and is a sensible, cost-effective alternative to buying single OEM batteries repeatedly.

It is less well suited to users who require a car adapter or a European plug in the box, since the package includes only an AC charger with a foldable flat pin and does not include car or alternate plug adapters. Buyers who need official-brand warranty support or original manufacturer packaging should also consider OEM replacements.

Pros & Cons

Pros

• High 2600mAh capacity provides notably longer runtime than many single-cell alternatives.
• Four batteries in one package greatly reduces interruptions during extended use.
• Charger LED makes it easy to know charge status without additional tools.
• Charger works on 100~240V mains for international use, simplifying travel.

Cons

• Package omits a car adapter and European plugs, which some users may need separately.
• Not an official OEM brand for Pentax or Trimble, so those preferring original-brand parts may look elsewhere.

Specifications

Battery type	Lithium-Ion
Voltage	7.4V
Capacity	2600mAh
Charger input	AC 100~240V 50~60Hz
Charger output	DC 8.4V 600mA
Charger indicator	LED red charging, green standby/full
Package contents	4 batteries and 1 AC wall charger

Our Verdict

The Kastar 4-Pack Ei-D-Li1 bundle is a practical value purchase for users of compatible Pentax, Trimble and HP devices who need reliable spare power and a convenient AC charger. Its high 2600mAh capacity and four-battery count make it an efficient solution to reduce downtime, though buyers should plan for their own car or alternate mains adapters if needed.

Frequently Asked Questions

Are these batteries compatible with Pentax D-Li1?
Yes, the pack lists compatibility with Pentax D-Li1 and related model numbers noted in the product details.

Does the charger work internationally?
The charger accepts AC 100~240V 50~60Hz, so it supports international voltages, but you may need a local plug adapter for different socket types.

Is a car adapter included?
No, the package includes four batteries and one AC wall charger only; a car adapter and other plug types are not included.