The CR 1/3N is a compact 3V lithium battery used in applications where reliable, stable voltage matters - laser sights, bore sighters, rangefinders, and certain medical devices. It’s not a battery you find at every corner store, so getting the right brand matters both for performance and availability. The picks below are selected for voltage consistency, shelf life, and dependable sourcing.
| Brand | Pack Size | Shelf Life | Best For |
|---|---|---|---|
| Duracell CR1/3N | 1-pack / 2-pack | 10 years | Top reliability |
| Energizer CR1/3N | 2-pack | 10 years | Widely available |
| Panasonic CR1/3N | 2-pack | 10 years | Consistent voltage |
| Streamlight CR1/3N | 6-pack | 10 years | Range/tactical use |
| Tenergy CR1/3N | 5-pack | 8-10 years | Value bulk buy |
Duracell CR1/3N - Best Overall
Duracell’s CR1/3N is the most trusted name for mission-critical battery applications and their lithium line is manufactured to tight tolerances. The 10-year shelf life makes it practical to buy in small quantities and store. Voltage consistency across the discharge curve is excellent, which matters in laser sights where a voltage drop causes dim output rather than clean cutoff. Duracell’s quality control is stronger than generic brands and they’re readily available through major retailers and Amazon, reducing the risk of receiving counterfeit cells that plague specialty battery categories.
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Energizer CR1/3N - Best for Availability
Energizer is Duracell’s closest competitor in lithium specialty batteries and offers comparable 10-year shelf life and voltage performance. The main advantage is distribution - Energizer’s specialty lithium line is stocked at more locations, making it easier to find locally if you’re in a pinch. Their 2-pack format is the standard offering and provides good value for occasional use. For users who like sticking to a single brand across all their lithium cells, Energizer makes a consistent and trustworthy choice.
Search for Energizer CR1/3N battery on Amazon
Panasonic CR1/3N - Best Voltage Consistency
Panasonic manufactures many of the lithium cells that end up in branded batteries and their own-label CR1/3N is a top performer for flat discharge curves. In devices like medical meters and high-precision optics where voltage fluctuation affects readings or output, Panasonic’s consistency is especially valuable. The batteries are made in Japan, which is a production quality signal in this category. Pricing is competitive with Energizer and the shelf life matches the 10-year standard for quality lithium cells.
Search for Panasonic CR1/3N battery on Amazon
Streamlight CR1/3N - Best for Tactical Use
Streamlight is known primarily for flashlights and weapon-mounted lighting, and they supply CR1/3N batteries specifically because many of their products and compatible laser sights run this cell. Buying a 6-pack directly from Streamlight ensures genuine cells rather than counterfeits, which is a real concern with specialty batteries on third-party marketplaces. The 6-pack format makes sense for shooters or law enforcement users who cycle through batteries regularly. These are the same cells Streamlight uses in their own devices, which is an implicit quality endorsement.
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Tenergy CR1/3N - Best Value Bulk Buy
Tenergy is a well-regarded third-party battery brand that sells 5-packs at a noticeably lower per-cell cost than the major brands. For users who run laser sights frequently or need to stock multiple devices, the savings on a 5-pack are meaningful. Tenergy’s quality is well above no-name generic cells and customer feedback consistently supports their 3V lithium line. The shelf life is slightly shorter at 8-10 years versus the 10-year claim from top brands, but for active users who cycle batteries regularly, this is not a practical concern.
Search for Tenergy CR1/3N batteries on Amazon
What to Look For
Voltage stability over discharge. Cheap CR1/3N cells often show rapid voltage drop before full depletion, causing laser sights to dim or produce inconsistent output. Quality lithium cells hold close to 3V until near-full depletion.
Shelf life. Look for cells rated at 10 years storage. If you’re buying a small quantity for a backup laser or medical device, long shelf life ensures they’re still functional when needed.
Counterfeit risk. Specialty batteries in low-demand formats are frequently counterfeited on large marketplaces. Buy from first-party sellers or well-established brands with direct Amazon storefronts to avoid receiving used or fake cells in sealed packaging.
Pack size. For occasional use, a 2-pack is practical. For shooters or field use, a 6-pack or 5-pack dramatically reduces per-cell cost without wasting batteries to shelf-life expiry.
Final Thoughts
Duracell is the safest overall choice for reliability and availability. Panasonic is the precision pick for voltage-sensitive devices. Streamlight’s 6-pack is the smart buy for anyone already in the tactical market who uses laser sights regularly. Avoid generic or unknown-brand CR1/3N cells - in a small specialty market like this, counterfeit and low-quality cells are common enough to make brand selection matter more than it would for AA or AAA batteries.
For related reading, see best CR123A batteries and best laser bore sighters. See how we evaluate products at /methodology.
Frequently asked questions
What devices use CR 1/3N batteries?+
CR 1/3N batteries are most commonly used in laser sighting systems, including rifle-mounted laser sights and bore sighters, as well as certain medical devices like glucose meters and hearing aids. Some older cameras and specialty electronic devices also use this format. Always check your device's manual to confirm the correct battery type before purchasing.
How long does a CR 1/3N battery last in a laser sight?+
Runtime varies significantly by device and usage. In a typical laser sight used intermittently for shooting sessions, a quality CR 1/3N battery can last 1-4 hours of continuous activation, or many months of standby use with auto-off features. Cheap batteries can show voltage drop much earlier, causing dim or unstable laser output before full depletion.
Are all CR 1/3N batteries the same size?+
CR 1/3N batteries follow a standardized size format - approximately 11.6mm diameter and 10.8mm tall - so physical fit is consistent across brands. However, quality varies considerably in terms of voltage consistency over discharge, shelf life, and performance in cold temperatures. Branded batteries from Energizer, Duracell, or Panasonic significantly outperform no-name alternatives.