Specifications

AC65/AC75 Hardware Interface Description

3.5 Charging Control

AC65_AC75_HD_v01.002 Page 42 of 117 2006-10-30

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3.5.4 Batteries Tested for Use with AC65/AC75

When you choose a battery for your AC65/AC75 application you can take advantage of one of the following two

batteries offered by VARTA Microbattery GmbH. Both batteries meet all requirements listed above. They have

been thoroughly tested by Siemens and proved to be suited for AC65/AC75.

• LIP 653450 TC, type Lithium Ion

This battery is listed in the standard product range of VARTA. It is incorporated in a shrink sleeve and has

been chosen for integration into the reference setup.

• PLF 503759C.PCM, type PoLiFlex® Lithium Polymer

This battery has been especially designed by VARTA for use with electronic applications like mobile phones,

PDAs, MP3 players, security and telematic devices. It has the same properties as the above Li-Ion battery,

except that it is type Polymer, is smaller, lighter and comes without casing.

Specifications, construction drawings and sales contacts for both VARTA batteries can be found in Section 9.3.

Table 8: Specifications of battery packs suitable for use with AC65/AC75

Battery type Rechargeable Lithium Ion or Lithium Polymer battery

Nominal voltage 3.6V / 3.7V

Capacity > 500mAh

NTC 10kΩ ± 5% @ 25°C

approx. 5k

Ω @ 45°C

approx. 26.2k

Ω @ 0°C

B value range: B (25/85)=3423K to B =3435K ± 3%

Overcharge detection voltage 4.325 ± 0.025V

Overdischarge detection voltage 2.4V

Overdischarge release voltage 2.6V

Overcurrent detection 3 ± 0.5A

Overcurrent detection delay time 4 ~ 16ms

Short detection delay time 50µs

Internal resistance <130mΩ

Note: A maximum internal resistance of 150mΩ should not

be exceeded even after 500 cycles and under extreme con-

ditions.