C2500mAh 4.8V Emergency Exit Sign Battery Replacement NiCd PVC
Jacket
High Cost-Effective NiCd C2500mAh 4.8V Emergency Exit Light
Batteries
Cell Product parameters:
| Description | Specification | Conditions |
| Nominal Voltage | 1.2 V | |
| Nominal Capacity | 2500mAh |
Standard Charge/Discharge,up to 3 cycles are allowed. |
| Minimum Capacity | 2500mAh |
| Standard Charge | 250mA(0.1C) × 16 hrs | Ta=0～70℃ (see Note 1) |
Rapid Charge |
1250mA(0.5C) ×156 mins approx. | (With -△V or dT/dt or TCO control) Timer CutOff =120% input capacity ( for ref. only) -△V= 5-10mV/cell dT/dt = 1～2℃/3min Temp. CutOff = 50℃ (122°F) Ta=10～35℃ |
| Trickle Charge | 125-250mA(0.05C-0.1C) | Ta=0～70℃ |
| Discharge Cut-off Voltage | 1.0V | |
| Maximum Discharging Current | 2500mA(1C) | |
| Operation Temperature | -20℃～70℃ | |
| Storage Temperature | -20℃～35℃ | |
| Typical Weight(approximate) | 71 g | |
Application:
| Pos. | Application fields | Application of the product |
| 1 | Lighting | emergency lighting, emergency power supply, solar lights,
searchlingts, flashlights |
| 2 | Power tools | electric drills, planers, saws, power granted |
| 3 | Electronic toys | remote control car, remote control boats, aircraft, model aircraft |
| 4 | Communication equipment | cordless phones, walkie-talkie |
| 5 | Other uses | electric shavers, massagers, electric tooth brush |
Product performance:
1.Ni-Cd battery has high charge and discharge efficiency and good
safety performance at high temperature and has long service life
under condition of long term floating charge, which makes it very
suitable for emergency lighting application.
2.Working temperature for Ni-Cd battery could be up to 55 degree,
and even up to 70 degree, and expected service life could be up to
4 to 5 years.
3. Wide range temperature adaptability.Ordinary nickel cadmium
batteries can be used in high or low temperature environment. High
temperature batteries can be used at temperatures of 70 degrees
Celsius or higher.
4. Reliable safety valve. The safety valve provides maintenance
free function. Nickel cadmium battery can be used freely in the
process of charge discharge or storage. Due to the special material
used in the sealing ring and the effect of sealant, the leakage
phenomenon of Ni Cd battery is rare.
Ni-Cd Battery Cell Performance:
1. Ni-Cd Cell Charge Curve At 0.1C For 16h At 55 Degree
2. Ni-Cd Cell Discharge Curve At 0.25C At 55 Degree
3. Ni-Cd Cell Charge Efficiency At Different Temperature
4. Ni-Cd Cell Capacity Change At Permanent Charge At 55 Degree
(0.05C Floating)
5. Ni-Cd Cell Cycle Life Curve
What are the different parts of a battery? A short summary:
· anode: the negative electrode during discharge. While charging,
this becomes positive. In AA and AAA batteries, this is usually the
protruding part on the top.
· cathode: the positive electrode during discharge. While charging,
this becomes negative. In AA and AAA batteries, this is usually the
flat part on the bottom.
· seal: a part of the battery cell that makes sure chemicals cannot
leave the battery. It also limits air intake. A good seal is
essential for a safe battery
Technical battery terms explained
Whereas they're simple to use, the electrical processes are often a
little more complex. Let's take a look at the most common technical
battery terms used:
· capacity: the amount of energy that is stored inside a battery.
It is measured in mAh (milliamp hours).
· voltage causes electric charges to move through the wire or other
conductors. It is measured in volt (V).
· cycle: one sequence of charge and discharge, or: how many times
you can use and recharge a battery. Every rechargeable battery has
a set amount of cycles (i.e. cycle life) before it starts losing
capacity and efficiency.
