Model 845 Rechargeable Battery

PRODUCTS / SERVICES

BioHawk ®
8-Channel Collection / Detection System

ASAP II Collection / Detection System

RAPTOR™ 4-Channel Bioassay System

Hand-Held Assays

Analyte 2000™ Fluorometer

SASS 2300
Wetted-Wall Air Sampler

SASS® 2400
Low Volume Wetted-Wall Air Sampler
SASS® 4000
Preconcentrator

SASS® 3000
Dry Air Sampler

SASS® 3010
Manual Particle Extractor

Rechargeable battery Model 845™

Research and Development

Research Machine

Collaboration and Licensing

Export Limitations

Product Bibliography

Model 845™ Rechargeable Battery

Model 845 Rechargeable Battery The Model 845 battery is a 4 V rechargeable lithium-ion cell of novel design that is only 8 mm in diameter and 4.5 mm in height. The cell was developed under the auspices of the National Institute of Aging to enable a new generation of hearing aids that do not require regular battery replacement. The battery has a design life of about 1,500 charge/discharge cycles, equivalent to the average 4-year lifetime of a hearing aid, and does not suffer from memory effects common to other chemistries. It has a capacity of 10 mAh and can be discharged at rates of up to 10 mA. The 10 mAh capacity is sufficient to power a hearing aid for one day. A hearing aid based on this battery offers the advantages of: cost savings—no replacement batteries to purchase; ease of use—no small batteries to handle; safety—no small batteries swallow or insert in the ear. Additionally, the cell may be pulse-discharged at rates of 100–200 mA which offers the opportunity for exciting pulse power applications.

Model 845™ Specifications
Characteristic	Description
Battery Type	Rechargeable lithium-ion.
Chemistry	Anode–carbon; Cathode–metal oxide; Electrolyte–lithium salt in organic solvent.
Dimensions	Size 845; 8 mm dia x 4.5 mm H (call for custom sizes/shapes).
Nominal Capacity	10 mAh at C/10 rate
Cumulative Capacity Over Cell Life; 50% DoD typ.	6 Ah/70 KJ
Nominal Voltage	3.8 V
Typical Load Voltage	3.6–3.8 V
Cell Impedence, DC–60 KHz	5–10 ohms
Cell Weight	0.5 g
Discharge Rates	C/100 to C; 100 µA to 10 mA
Pulse Rates	Up to 20 C; 200 mA
Cycle Life	>1,000 cycles
Operating Temperature	10–40°C

Research International reserves the right to change specifications on any of the devices mentioned without prior notification.

For more information, see:

Model 845 specifications (PDF, 99 KB)

Adobe® Acrobat® Reader is necessary for viewing and printing .pdf files and is available to download at no charge from Adobe Systems.

Site last updated January 19, 2008