|
|
|
 |
|
|
Home > How To Choose Battery
Category : How To Choose Battery
| How to select the correct battery pack (General Knowledge)? |
- First of all, you must get to know your device:
- What is device's input voltage? ( V)
- What is its power consumption ( Wattage ) ?
- What is Maximum current drain ( A) ?
- What is your expected running time by a battery pack ?
- Decide battery pack voltage you will choose
- Battery pack voltage must be equal or a little higher than your device’s need.
- If you need a exact voltage, which battery pack can not provide, you may consider to use a DC-DC regulator
- Decide Battery pack's Capacity ( mAh or Ah)
- Battery capacity is depended on how long you need to run your device ( hours ), which can be calculated as the follow:
- ( Ah) = Device's Wattage (W) x Time to run ( Hours) / Battery Voltage (V)
- For example, if using a 12V battery pack, and run 10W DC device for 10 hours, you need choose a battery pack with capacity > 8.3Ah, e.g (10x10)/12 = 8.3
- 1000 mAh = Ah, higher mAh will provide longer running time.
- Decide Battery pack’s Max. discharging current
- Before order battery pack, you must pay attention on battery pack’s Max. discharging rating on the specification or description. Please don’t think any battery can take any current drain.
- You shall know your device’s max. discharging current. If you don’t know , you must measure it by a multi-meter.
- The battery pack’s Max. discharging rate of the chosen Battery must be higher than that device requires
- Choose Li-Ion, NiMH or Lead acid battery?
- What type of rechargeable battery will work for you. Question is size and weight. The table below lists the advantages and disadvantages of these batteries for your reference
|
Chemistry
|
Cost
|
Weight
|
Temp(ºC)
|
Cycle Life
|
Shelf Life (months)
|
Volts / Cell
|
|
Lead Acid
|
$$
|
Very Heavy
|
-65 to 80
|
300
|
12
|
2.0
|
|
Nickel Cadmium
|
$$
|
Heavy
|
-20 to 65
|
500+
|
6
|
1.2
|
|
Nickel Metal Hydride
|
$$$
|
Moderate
|
-10 to 65
|
500
|
12
|
1.2
|
|
Lithium Ion
|
$$$$
|
Light
|
-20 to 60
|
500
|
12
|
3.7
|
|
Lithium Polymer
|
$$$$$
|
Light
|
-20 to 60
|
500
|
12
|
3.7
|
- Li-Ion batteries has the highest energy density ( mAh/weight), and become more and more popular. However, Li-Ion may explode and cause a fire if it dose not use properly. Please read our safety warning.
- Choose a Battery Charger
- Please always follow our suggestion to choose a smart charger. So called smart charger must has automatic cut-off function when battery is full.
- Never use NiMH/Li-ion battery charger for Li-ion/Nimh battery pack, it will cause battery exploded
- Always charging your battery with attention, and put battery in a fire-proof container box to avoid accident.
- Understand risk to use NiMH and Li-ion battery. Please read our safety warning before buying a battery
|
| |
| |
| How to choose the correct razor battery? |
|
There are too many models of Razors on market , we can not tell you which battery is for which model. However, you can find a suitable battery from our website by yourselves following the procedure blow:
- Get a ruler and voltage meter in hand
- Determine your battery pack voltage --- Account how many cell in your original battery pack. Each cell has 1.2V. For example, if there are two single cells in your pack, its voltage is 2.4V. You can double check battery voltage by voltage meter if battery is not dead.
- Determine battery pack's size ( length x width x Height)
- Choose a battery pack from Razor battery with smaller size and same voltage
- Please be advised as long as battery voltage is correct, and battery pack can put in your razor, you can use it to replace your original battery
- Whatever NiCd battery or NiMH battery --- NiMH battery is better
- Whatever mAh rating, higher mAh always is better
- Whatever shape same or not, as long as it can put in razor
- Warning: Battery pack must be connected to razor with correct polarity, e,g positive to positive and negative to negative. Please double check polarity on the both of Razor and battery before using.
|
| |
| How to choose the battery packs for bike lights? |
- Before replacing a rechargeable battery for bike light, you must know following data
- What kind of light do you have ? Halogen Light or HID light ?
- If it is halogen light, what are Voltage and Wattage on your bike light? 6V or 12V? 5W or 15W?
- If it is HID light, what are Voltage on your Light? 12V system or 14.8V regulated ?
- Battery Packs for Halogen Bike Light
- Halogen bike lights have two types: 6V or 12V. Please make sure light bulb voltage before choose battery, otherwise, light bulb may burn out immediately
- Halogen light has much lower cost than HID, and drain more energy from battery. NiMH battery pack is suitable for all Halogen light.
- In order to get better brightness and longer burn time, you can overdrive light up to 25% at voltage, for example
- 6V halogen light can use battery packs from 6V to 7.4V
- 12V Halogen light can use battery packs from 12V to 14.8V
- However, overdriving may reduce bulb life at same percentage ( Halogen light bulb is inexpensive )
- Li-Ion battery pack can be used on halogen bike light, but you have to make sure PCB on Li-Ion battery pack can pass through higher higher initial current ( 3 time higher than normal current)
- Battery Packs for HID Bike Light.
- HID light three times higher brightness than halogen light at same power wattage, but much more expensive.
- HID light must be fired between 9V -13.8V. If battery voltage is higher than 13.8V , the bulb may burn out quickly. So usually HIH lighting system has voltage controller to regulate voltage at 11V - 13V.
- If using 12V-13.2V NiMH battery pack or 11.1V Li-Ion battery pack to drive HID light, you can drive any HID bike light on the market without voltage controller
- Please never drive HID light by 14.8V or higher voltage battery pack without voltage controller.\
- Li-Ion battery is the most suitable for HID light because its less weight and higher energy
- Usually, HID manufactures don't list all data on their battery pack , and they want to earn your money on replacement battery. Doesn't matter. you can email us your light's brand name and P/N to tech@batteryspace.com , our engineer will suggest you a right battery pack immediately at 50% or more less cost. Also, you can find battery data from below list.
- How to Calculate burn time of battery pack for bike lights
- Battery burn time is decided by battery capacity , e.g. mAh or Wh. Higher mAh or Wh will provide more burn time
- The time can be estimated as the following:
- Burn time ( Hours) = Battery Wattage Hours (Wh) / BLight bulb Wattage (W)
- here , Wh = Battery voltage ( V) x Capacity (Ah), 1000mAh= 1Ah
- for example, battery pack ( 14.8V , 4.8 Ah) has 72Wh energy, can burn 13W light for 5.46 hour
- List of Battery Pack's Voltage for major brands HID Bike lights
- How to change connector and Cable
- All brands bike light's connectors and cable are customized in special size , and can not be exchanged
- You shall keep the connector in your old battery pack and install it to new battery modules
- For HID light, you must connect cable in right polarity : positive to positive and negative to negative , otherwise, HID light can not be fired.
- You shall use Iron gun to solder junctions well, and use electric tape wrapping the the junctions.
|
| |
|
|
|