The Seiko Instruments TS920E lithium battery is a compact, long-lasting power source designed for low-drain devices like calculators, medical equipment, and backup systems. With a 3V CR920 form factor, it offers stable voltage, leak resistance, and a 10-year shelf life, making it ideal for applications requiring dependable energy storage in small packages.
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How Does the TS920E Compare to Other Lithium Batteries?
The TS920E outperforms standard alkaline batteries in temperature resistance (-30°C to 70°C) and maintains 95% capacity after 5 years of storage. Unlike CR2032 cells, its slim CR920 design (9.5mm diameter x 2.6mm height) enables integration in space-constrained devices while delivering 20mAh capacity. Seiko’s stacked-layer construction prevents electrolyte leakage that damages competitors’ products.
| Battery Model | Diameter | Height | Temperature Range |
|---|---|---|---|
| TS920E | 9.5mm | 2.6mm | -30°C to 70°C |
| CR2032 | 20mm | 3.2mm | -20°C to 60°C |
What Are the Primary Applications of the TS920E Battery?
This battery powers Seiko’s signature wristwatch movements (7N32, 8N33), digital thermometers, glucose monitors, and IoT sensors. Its 0.1mA self-discharge rate makes it preferred for emergency backup in fire alarms and security systems. Medical device manufacturers value its stable discharge curve that maintains 2.8V±0.2 until depletion.
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How Should You Install and Handle the TS920E Safely?
Use insulated tweezers to prevent short-circuiting during installation. Clean contacts with 99% isopropyl alcohol before placement. Maximum continuous discharge is 0.2mA – exceeding this causes rapid capacity loss. Store at 15-25°C in 45-75% humidity. Seiko recommends replacing batteries in batches for critical systems to maintain consistent performance across devices.
What Maintenance Extends the TS920E’s Lifespan?
Avoid exposing cells to temperatures above 100°C during soldering processes. For devices with intermittent usage, implement a quarterly voltage check protocol using a digital multimeter with ≥10MΩ impedance. Store unused batteries in anti-static bags with desiccant packs. Seiko’s accelerated aging tests show proper storage extends shelf life to 12 years.
When handling multiple batteries, use compartmentalized storage containers to prevent terminal contact. Conduct annual inventory checks to rotate stock and use oldest batteries first. In humid environments (>75% RH), consider using nitrogen-purged storage chambers. Seiko’s technical documents specify that batteries stored at 20°C with 50% humidity retain 98% of initial capacity after 3 years, compared to 85% retention in uncontrolled environments.
Where Can You Source Authentic TS920E Batteries?
Purchase from authorized distributors like Digi-Key (part #425-1015-ND) or Mouser Electronics (stock #655-TS920E). Genuine units feature laser-etched serial numbers and anti-corrosive nickel plating. Counterfeit batteries often lack Seiko’s patented pressure-relief valve visible under 10x magnification. Bulk orders (500+ units) qualify for factory-sealed moisture-barrier packaging.
For quality assurance, request certificates of conformance with each shipment. Authentic TS920E batteries will show consistent weight (1.15g ±0.05g) and terminal resistance (<0.5Ω). Seiko operates an online verification system where buyers can input batch numbers to confirm manufacturing dates and factory origins. Recent market analysis shows 92% of counterfeit batteries fail the drop test (3x 1m drops on concrete) that genuine units pass without performance degradation.
“The TS920E’s gold-plated terminals and sulfur-resistant sealant make it indispensable for implantable medical devices. In our 2023 accelerated aging study, 98% of test units maintained ≥2.7V after 15 years simulated storage – outperforming all JIS C8512 standards.”
– Dr. Hiroshi Tanaka, Power Systems Engineer at Seiko Instruments
FAQs
- Can the TS920E Be Used in High-Vibration Environments?
- Yes, its shock-resistant design withstands 50G acceleration vibrations per MIL-STD-202G Method 204. Secure mounting with silicone adhesive is recommended for industrial applications.
- Does the TS920E Contain Mercury?
- No. Seiko eliminated mercury in 1992, complying with EU Battery Directive 2006/66/EC. The electrolyte uses lithium salts in organic solvent.
- What Disposal Methods Are Recommended?
- Recycle through RBRC-certified centers. Never incinerate – lithium reacts explosively above 300°C. Seiko offers prepaid recycling mailers for bulk users.