Kastar 2-Pack Battery Replacement for RCA PRO-847 PRO-851 - Long

In this review the Kastar 2-Pack Battery Replacement is evaluated for camcorder users who need dependable, longer run times. The bottom line: this set is for owners of compatible RCA and Pentax camcorders who want a higher-capacity alternative to stock cells, because the high capacity 2650mAh Ni-MH chemistry delivers noticeably longer recording sessions without frequent swaps. The pack includes two batteries, so it suits anyone who records events, field footage or long shoots and prefers carrying a ready spare over hunting for chargers between takes.

Key Features

• High capacity: The 2650mAh rating provides extended runtime so users can record longer clips between charges and reduce interruptions during shoots.
• Ni-MH chemistry: The 6.0V Ni-MH construction is a common, rechargeable format that balances capacity and compatibility with older camcorder models.
• Safety assurance: Kastar's mix-protection additive aims to reduce material degradation during charge cycles, which helps extend usable life up to 1000 cycles.
• Low self-discharge: The embedded seal structure reduces self-discharge so batteries hold charge longer in storage and are ready when needed.
• Two-pack convenience: The included 2-pack gives a spare battery immediately, useful for multi-hour shoots or backup when traveling.

Who It's For

This product is best for owners of older RCA and Pentax camcorders listed in the compatibility notes who want a direct, higher-capacity replacement battery that fits existing battery bays and accessories. It is also a good choice for hobbyists and event videographers who need reliable power for extended recording sessions and prefer carrying an extra battery rather than frequent charging breaks.

It is not intended for users who need a battery for models not listed in the compatibility section or for those who require the absolute smallest or lightest cell; users with modern cameras that use different battery formats should look for a model-specific option.

Pros & Cons

Pros

• Higher 2650mAh capacity delivers longer runtime compared with many original batteries.
• Two batteries in the package provide an immediate spare for extended shoots or travel.
• Design includes additives and an embedded seal structure intended to extend lifespan and lower self-discharge.

Cons

• Compatibility is limited to a specific list of RCA and Pentax models, so verification is required before purchase.

Specifications

Battery Type	Ni-MH
Battery Voltage	6.0V
Battery Capacity	2650mAh
Pack Contents	2-Pack batteries
Compatibility	Selected RCA and Pentax camcorder models and listed battery models
Cycle Life	Up to 1000 cycles (manufacturer claim)

Our Verdict

The Kastar 2-Pack Battery Replacement is a practical, cost-effective option for owners of compatible RCA and Pentax camcorders who need longer run times and an immediate spare. With higher 2650mAh capacity, Ni-MH chemistry and design features to reduce self-discharge, it represents good value for videographers who require dependable power and fewer interruptions during recording.

Frequently Asked Questions

Will these batteries fit my RCA camcorder?
Check the compatibility list against your camcorder model or battery model numbers; the pack is intended for specific RCA and Pentax models.

How long will the batteries hold a charge in storage?
Kastar states a low self-discharge design so they retain charge longer than standard Ni-MH cells, but storing them charged and cool is still recommended.

Are these rechargeable many times?
Yes, the batteries use Ni-MH chemistry and are claimed to last up to 1000 charge cycles with the manufacturer's additives to reduce degradation.