Rechargeable Button Cells NiMH Sales Program and Technical Handbook

Rechargeable Button Cells 1.2 General Design and Application Criteria 7 2.1 Construction and Electrochemical Processes of NiMH High Rate Button Cells 10 2.3 NiMH High Rate Button Cell Batteries for Bridging, Hot Swap and Memory Protection Applications 12 2.4 NiMH Button Cell Batteries for Memory Protection 13 2.5 NiMH Button Cell Batteries for Bridging Applications 14 2.6 Standard NiMH Button Cell Batteries for Alarm Equipment (Car Alarm, ...) 15 2.7 Standard NiMH Button Cell Batteries for Electronic Equipment 16-18 2.8 Charging Methods for NiMH Button Cells...

VARTA Microbattery is a leading firm in the field of batteries and provides professional support for customers with engineered design-in applications worldwide. Quality, reliability, high performance and customer satisfaction are the main reasons for our leading position in the market. VARTA Microbattery provides solutions to major OEM companies for high-tech applications such as notebook/pda bridging function, memory backup and real-time clock in PCs/notebooks as well as power source for telecom devices, remote control devices, torches, domestic alarms, car alarms, medical equipment, consumer...

Rechargeable Button Cells Four button cell families with specific strengths and features provide the ideal battery solution for any application. Each family has its speciality to provide optimum solution for dedicated application areas. Type Designation

From V 6 HR to V 600 HRT, from 6 mAh up to 600 mAh - VARTA provides a full programme of rechargeable button cells for all performance requirements. Quality - Made in Germany ■ Manufactured on highly automated lines ■ Direct replacement for NiCd ■ No memory effect ■ 0% lead, 0% mercury and 0% cadmium ■ UL Recognition under file BBET2.MH13654 V...H V...HT High performance button cell with superior overcharge stability and discharge currents < 2 CA at high temperature. Based on mass electrode technology, temperature range -20°C to +85°C. Typical Applications: ■ Industrial Electronics ■ Automotive...

Rechargeable Button Cells High rate button cell with superior load capability for dis-char-ge currents up to 5 CA. Based on foam electrode technology, temperature range -20 to +65°C. Typical Applications: ■ Consumer Electronics ■ Health Care Devices ■ Wireless Headsets, Headphones High rate and high temperature button cell with superior load capability for discharge currents up to 5 CA at high temperature. Based on foam electrode technology, temperature range -20 to +85°C. Typical Applications: ■ Automotive Electronics ■ Server, Computer ■ Emergency Light, Solar Light Type Designation Battery...

The choice of the most suitable cells or battery types is exclusively related to the type of application and the operating conditions. ■ Type of operation of the cell, i.e. cyclic operation (continuous sequence of charge/discharge) or standby operation, trickle charged ■Available space ■Maximum weight The most important criteria for selection are as follows: ■ Temperature during use ■ Duration and level of load (continuous pulsed) ■ Operating voltage required with voltage limiting values ■ Charging conditions The relevant cell data can be found in the corresponding sections of this catalogue....

Rechargeable Button Cells

Rechargeable Button Cells 2.1 C ONSTRUCTION AND ELECTROCHEMICAL PROCESSES OF NIMH BUTTON CELLS A special sealing design maximizes the diffusion path and guarantees optimal protection against leakage. The cup of the casing acts as the positive terminal and the lid as the negative terminal. The punched positive sign on the cell is used as a safety device which opens at predetermined internal pressure, in case of gross abuse. Some cells are interchangeable with 1.5 V primary cells of identical dimensions. A sealed NiMH Button Cell requires that towards the end of the charging process, oxygen which...

Cells with typical capacities from 16 up to 380 mAh Nominal cell voltage 1.2 V Wide operating temperature range Built-in safety device UL Recognition Limited fast charge possible (within 3 h at 0.5 CA, at +20°C, after fully discharged cells) Suitable for overcharging at room temperature ■ Long life expectancy ■ Self-discharge less than 10% after 1 month at +20°C ■ High temperature range V...HT - High capacity - Long life expectancy especially at charging/trickle charging and discharging at higher ambient temperature TAB. 7 1) After full discharge. Limited fast charge must be limited to room temperature,...

Rechargeable Button Cells 2.3 N IMH BUTTON CELL BATTERIES FOR BRIDGING, HOT SWAP AND MEMORY PROTECTION APPLICATIONS Bridging Batteries Bridging batteries from VARTA Microbattery are optimised in small size and provide high power output for bridging mobile computers e.g. during main battery change. Bridging batteries temporary take over the supply of DRAM and other chips in notebooks, PCs, handhelds, calculators, etc. when the main battery is replaced within a certain time frame specified by the manufacturer. Typical Application ■ Mobile phones (GSM, PCN, GPRS, DECT, cordless phones) ■ GPS-terminals/voice...

MBU/RTC Batteries Typical Application ■ PCs ■Notebooks ■Hi-Fi Systems ■Car stereo, etc. These batteries are designed for memory backup (MBU) and support to RTC (Real Time Clock) in various electronic applications. NiMH Button Cell Batteries in the charged state are suitable for wave soldering (tmax. = 10 sec., Tmax. = 265°C). For further information on other NiMH Button Cell Batteries for memory protection please consult VARTA Microbattery. Popular Memory Backup Batteries for PC 3/V 15 H 3 55602 303 0151) 3.6 16 15 10.6 -1 12.4 -0.5 12.4 -0.5 4 TAB. 8...

Rechargeable Button Cells Bridging Batteries Bridging batteries from VARTA Microbattery are optimised in small size and provide high power output for bridging mobile computers e.g. during main battery change. Bridging batteries temporarily take over the supply of DRAM and other chips in notebooks, PCs, handhelds, calculators, etc. when the main battery is replaced within a certain time frame specified by the manufacturer. Typical Application ■ Notebooks ■ Handhelds ■ Calculators A typical requirement for example is this: ■ Charging current: 0.1 CA (+0.03 CA) continuous ■ Operating temperature:...