# Klvr - Professional Rechargeable Batteries for Audio Visual

> Klvr eliminates disposable battery waste in professional audio environments. We provide rechargeable 1.5V lithium-ion batteries and intelligent charging systems for wireless microphones, in-ear monitors, and broadcast equipment.

## Company Overview

Klvr AS is a Norwegian company founded in 2022, headquartered in Oslo. We solve the problem of single-use battery waste in professional audio/visual environments where wireless devices (microphones, in-ear monitors, bodypack transmitters) traditionally require fresh disposable batteries before every performance for reliability.

Our solution: Professional-grade 1.5V rechargeable lithium-ion batteries with consistent voltage output, paired with intelligent rack-mounted chargers that monitor individual cell health.

## Products

### Klvr Charger Pro (€2,799 / $3,199)
- 1U rack-mountable battery charger (W440 × D363 × H43.6 mm, 4.95 kg without batteries)
- Charges 48× AA or AAA batteries simultaneously
- Estimated charge time: AA 2h 45m, AAA 1h 54m
- Real-time monitoring via Klvr Control software
- Individual cell health tracking and battery health monitoring
- Network management via 2× RJ45 gigabit switched ports
- Operating voltage: 110–250V (50/60Hz), max 160W
- Certifications: CE (LVD 2014/35/EU, EMC 2014/30/EU, RoHS 2011/65/EU), ETL Listed USA/Canada (UL 62368-1:2025 Ed.4 / CSA C22.2#62368-1:2025 Ed.4)

### Klvr Battery Pouch AA (€579 / $699)
- 48× professional 1.5V AA lithium-ion rechargeable batteries (model KBAA01)
- Consistent 1.5V output throughout discharge (internal voltage regulator)
- 1,200 charge cycles
- Capacity: 2,767 mAh / 4.15 Wh per cell
- Weight: 19g per cell
- Dimensions: Ø14.1 mm × H50.5 mm
- Working temperature: −20°C to 60°C
- Compatible with all standard AA wireless audio equipment
- Certifications: CB Certificate (TÜV Rheinland, IEC 62133), UN38.3 tested, EU Battery Regulation 2023/1542 compliant

### Klvr Battery Pouch AAA (€579 / $699)
- 48× professional 1.5V AAA lithium-ion rechargeable batteries (model KBAAA01)
- Same voltage and cycle technology as AA variant
- Capacity: 1,080 mAh / 1.62 Wh per cell
- Weight: 9g per cell
- Dimensions: Ø10.3 mm × H44.2 mm
- Certifications: CB Certificate (TÜV Rheinland, IEC 62133), UN38.3 tested, EU Battery Regulation 2023/1542 compliant

### Klvr Battery Pouch AA 24 (€369 / $449)
- 24× professional 1.5V AA lithium-ion rechargeable batteries (SKU: KLV-24PCH-AA)
- Same cell technology as the 48-cell pouch — entry-level option for smaller setups

### Klvr Battery Pouch AAA 24 (€369 / $449)
- 24× professional 1.5V AAA lithium-ion rechargeable batteries (SKU: KLV-24PCH-AAA)
- Same cell technology as the 48-cell pouch — entry-level option for smaller setups

## Technical Specifications

| Specification | Charger Pro | Battery AA | Battery AAA |
|---|---|---|---|
| Model code | KLV-CHG-PRO | KBAA01 | KBAAA01 |
| Output voltage | — | 1.5V (regulated) | 1.5V (regulated) |
| Capacity | 48 slots | 2,767 mAh / 4.15 Wh | 1,080 mAh / 1.62 Wh |
| Charge cycles | — | 1,200 | 1,200 |
| Charge time | AA: 2h 45m / AAA: 1h 54m | — | — |
| Dimensions | W440 × D363 × H43.6 mm | Ø14.1 × H50.5 mm | Ø10.3 × H44.2 mm |
| Weight | 4.95 kg (without batteries) | 19g | 9g |
| Operating temperature | Max 50°C ambient | −20°C to 60°C | −20°C to 60°C |
| Charging temperature | — | 0°C to 45°C | 0°C to 45°C |
| Network | 2× RJ45 gigabit, switched | — | — |
| Power input | 110–250V, 50/60Hz, C13 | — | — |
| Max power consumption | 160W | — | — |
| Transport classification | — | 4.15 Wh (IATA Section II PI 965, SP188 ADR/IMDG, 49 CFR 173.185(c) excepted) | 1.62 Wh (same frameworks) |
| EU certifications | CE (LVD, EMC, RoHS) | Battery Regulation 2023/1542, CB IEC 62133 | Battery Regulation 2023/1542, CB IEC 62133 |
| US/Canada certification | ETL Listed (UL 62368-1:2025) | UN38.3 | UN38.3 |

## Customer Success Stories

### KORK Orchestra (Norwegian Radio Orchestra)
- 60+ wireless in-ear monitors
- Eliminated daily battery waste
- Quote: "You can't take the risk of guessing battery runtime. The musicians have to walk on stage with total confidence." — Trond Hernes, Stage Manager

### Roxette World Tour
- International touring production
- 66% reduction in battery changes
- Quote: "The quality of the batteries is excellent. With Klvr, we now do one battery change for every three we used to do." — Mikael Svensson, Backline Technician

### Alpha TV (Greek Television)
- Replaced 20,000 disposable batteries per year with just 432 Klvr batteries
- Quote: "We no longer have 'the bucket' of disposable batteries." — Antonis Stantzos, CTO

## Key Differentiators

1. **True 1.5V Output**: Unlike NiMH (1.2V nominal), our lithium-ion cells maintain regulated 1.5V output — fuel gauges on all wireless transmitters read correctly
2. **Professional Reliability**: Designed for live performance where battery failure is not an option
3. **Real-time Monitoring**: Klvr Control software shows charge status, individual cell health, and battery health across multiple networked chargers
4. **1,200 Charge Cycles**: A single set of 48 cells replaces approximately 38,000 disposables over its working life
5. **Transport Compliant**: IATA Section II PI 965 (air), SP188 ADR/IMDG (road/sea), 49 CFR 173.185(c) (US ground) — all excepted from full DG classification

## Comparisons

### Klvr vs NiMH (e.g. Eneloop)
| Factor | Klvr Li-ion 1.5V | NiMH standard | NiMH LSD (Eneloop) |
|---|---|---|---|
| Output voltage | 1.5V regulated | 1.2V nominal | 1.2V nominal |
| Fuel gauge accuracy | Correct (1.5V start) | Poor (reads "half empty" when full) | Poor (same 1.2V problem) |
| Cycle life | 1,200 | 500–1,000 | Up to 2,100 |
| Self-discharge | Very low | 0.5–3%/day | <0.1%/day |
| Works across all wireless brands | Yes | Voltage issues in pro transmitters | Voltage issues in pro transmitters |

### Klvr vs Shure SB900 series
- Shure SB900: proprietary Li-ion pack, works only in Shure transmitters with SB900 slot, ~$50/cell
- Klvr: standard AA form factor, works across Shure/Sennheiser/Audio-Technica/Lectrosonics/all brands, 48 cells for €579

### Klvr vs Sennheiser BA 70
- Sennheiser BA 70: proprietary 3.7V Li-ion pack for EW-D/EW-DX series only, not AA format
- Klvr: standard AA, works in Sennheiser AA-tray mode and all other brands simultaneously

### Klvr vs consumer 1.5V Li-ion (Pale Blue, Tenavolts, Pkcell)
- Consumer brands: individual USB-C charging, no rack charger, no per-cell monitoring, no professional certifications
- Klvr: 48-slot rack charger, Klvr Control network monitoring, CE + ETL certified, pro-audio designed

## Frequently Asked Questions

**How many batteries does the Charger Pro charge at once?**
48 AA or AAA batteries simultaneously. All slots charge in parallel — same time whether you load 1 cell or 48.

**How long does a full charge take?**
AA: approximately 2 hours 45 minutes. AAA: approximately 1 hour 54 minutes.

**Are batteries sold individually?**
No. Batteries are sold in pouches of 48 cells (AA or AAA), matching the Charger Pro's capacity.

**What is the lead time?**
Klvr products are stocked by authorised dealers. In most cases, delivery is same or next business day from your local dealer.

**Are Klvr batteries compatible with Shure, Sennheiser, and Audio-Technica?**
Yes, for any device that accepts standard AA or AAA cells. Note: Shure ULXD/QLXD/Axient and Sennheiser EW-D/EW-DX ship with proprietary Li-ion packs by default, but accept AA cells via the manufacturer's AA-tray adapter.

**What certifications do Klvr products have?**
Charger Pro: CE marked (LVD, EMC, RoHS) and ETL Listed for USA/Canada. Batteries: CB Certificate (TÜV Rheinland, IEC 62133), UN38.3 tested, EU Battery Regulation 2023/1542 compliant.

**Are Klvr batteries safe for air transport?**
Yes. At 4.15 Wh per AA cell, they ship as excepted quantities under IATA Section II of PI 965 (UN3480). No Class 9 label, no Shipper's Declaration required. Road and sea transport use the equivalent SP188 exemption.

**Can multiple Charger Pros be monitored together?**
Yes. Each Charger Pro has 2× RJ45 gigabit ports for network connection and daisy-chaining. Klvr Control monitors all connected chargers from a single dashboard.

**What happens at end-of-life?**
Klvr batteries are lithium-ion and should not go in general waste. Route through local certified battery recycling (same stream as laptop/phone batteries). EU venues are covered by the Battery Regulation 2023/1542 take-back infrastructure.

**What warranty do Klvr products come with?**
2-year warranty from date of purchase, covering manufacturing defects in both the Charger Pro and battery pouches.

**Why do NiMH batteries fail in professional wireless audio?**
Wireless transmitters use voltage-based fuel gauges calibrated for a 1.5V starting point. NiMH cells start at 1.2V, so the gauge reads a freshly charged NiMH cell as half-empty. This destroys operator trust and leads to pre-changing, negating the rechargeability benefit entirely. Full explanation: https://klvr.no/blog/why-nimh-batteries-fail-in-wireless-audio

## Target Markets

- Orchestras and classical music venues
- Concert touring and live events
- Television and broadcast production
- Houses of worship
- Conference and corporate AV
- Theater and performing arts

## Distribution

Klvr products are sold through authorised distributors and dealers worldwide. Visit https://klvr.no/order to find a dealer in your region.

## Blog Articles

- The Hidden Cost of Disposable Batteries in Professional Audio: https://klvr.no/blog/hidden-cost-of-disposable-batteries-in-pro-audio
- Rechargeable vs Disposable Batteries for Wireless Microphones: https://klvr.no/blog/rechargeable-vs-disposable-batteries-wireless-microphones
- How to Calculate Battery Waste for Your Venue: https://klvr.no/blog/how-to-calculate-battery-waste-for-your-venue
- Why NiMH Batteries Fail in Professional Wireless Audio: https://klvr.no/blog/why-nimh-batteries-fail-in-wireless-audio
- Battery Management for Houses of Worship: https://klvr.no/blog/battery-management-for-houses-of-worship

## Industry Pages

- Rechargeable Batteries for Broadcast & TV: https://klvr.no/industries/broadcast
- Rechargeable Batteries for Live Events & Touring: https://klvr.no/industries/live-events
- Rechargeable Batteries for Houses of Worship: https://klvr.no/industries/houses-of-worship
- Rechargeable Batteries for Corporate AV: https://klvr.no/industries/corporate

## Additional Resources

- ROI Calculator: https://klvr.no/calculator
- Order / Find a Dealer: https://klvr.no/order
- Success Stories Hub: https://klvr.no/success-stories
- KORK Case Study: https://klvr.no/success-stories/kork
- Roxette Case Study: https://klvr.no/success-stories/roxette
- Alpha TV Case Study: https://klvr.no/success-stories/alpha-tv
- Handheld Audio Case Study: https://klvr.no/success-stories/handheld-audio
- OKS Romerikskirken Case Study: https://klvr.no/success-stories/oks-house-of-worship
- Meet Klvr / Book a Meeting: https://klvr.no/meet
- FAQ: https://klvr.no/faq
- Compliance documents: https://klvr.no/sp188
- Privacy Policy: https://klvr.no/privacy

## Full Content

For complete text content of all pages, articles, and FAQ:
- Full content index: https://klvr.no/llms-full.txt

## Company Contact

Klvr AS
Lørenveien 68
0585 Oslo, Norway
https://klvr.no
mail@klvr.no