Frequently asked questions (Q & A)
Q: Why the 1.2V Ni-MH rechargeable batteries, especially low self discharge battery, has much better performance at high rate applications than the 1.5V alkaline batteries?
A: NiMH batteries are spirally wound design compare to a bobbin type design of a alkaline batteries. The spirally wound design provides high electrode surface area therefore the total current can be much higher at a similar kinetics of the battery electrochemical reaction. Due to the same reason, Ni-MH batteries provide higher discharge voltage than alkaline batteries. In addition, low self discharge Ni-MH battery has longer storage period, other than alkaline batteries.
Q: Why should I choose NEXcell rechargeable batteries over other types of batteries?
A: NEXcell batteries have longer cycle life, which means you can save money comparing to rechargeable alkaline of 50 recharges and non-rechargeable batteries. Our batteries are also designed for power intensive applications such as digital camera, the batteries will maintain a high and consistent voltage during its discharge cycle, unlike the other batteries their voltage drop rapidly at high power demand applications. NEXcell batteries have lower impedance than the other brands in the market.
Q: What is the ¡°no memory effect¡±?
A: The traditional Ni-Cd batteries world develop memory effect problem if the batteries are discharged at a fixed depth of discharge and then recharged frequently before they have fully drained. ¡°No memory effect¡± means that you can charge the batteries anytime you like without worrying their performance and battery life.
Q: How long a rechargeable battery will last?
A: The charge holding time of an unused rechargeable battery at room temperature is about one to three months depends on the storage temperature. The best storage temperature range is 10 to 20 degree C. NEXcell Ni-MH batteries are rechargeable up to 500-1000 times, lithium batteries are up to 1000~2000 cycles, depending on discharge and charge current and working condition.
Q: Why should I pay more for the ¡°higher battery capacity¡±?
A: The capacity of rechargeable batteries is rated in ¡°mAh¡± (mili-ampere hours). If the discharge current is fixed, for example, 1000 mA, the higher capacity means the battery will last longer so you would pay for more in price.
Q: What is conditioning?
A: The conditioning process is used first to drain the charge from the batteries and then charging them. Conditioning can allow batteries to perform at their best standards and eliminate the memory effect of Ni-Cd batteries. For Ni-MH batteries, conditioning is recommended for every ten to twenty charges.
Q: Batteries should not leave in the charger for a long period of trickle charging. Why NEXcell charger can keep the battery in the charger for long time?
A: We should not leave the rechargeable batteries in the charger for a long period of time because the batteries will be deteriorated by the trickle charging current after long term charging. We recommend to taking the batteries out of charger when the charging is completed and keep them in a cool location. However, NEXcell chargers do provide lower trickle charging current for longer trickle charging time compare to most of the chargers. Our Model 70 charger provides an autostop function of trickle current after batteries charged to full capacity and then the batteries will be no current rest for seven days and followed by a 200 mA charge for one hour. The rest/one hour charge cycle will be repeated as long as the battery is still maintained in the charger. The battery will be kept full capacity and without damaged by the trickle charge. This unique design will allow user to store the batteries in NEXcell charger with full capacity whenever we need it.
Q: Is it normal that the batteries get warm when charging the rechargeable batteries?
A: It is normal that the batteries will increase temperature during charging Ni-MH or Ni-Cd rechargeable batteries because the increase of internal resistance and less energy conversion efficiency from electric energy to chemical energy. We recommend you leave the lid open during charging to reduce the heat build up inside the charger.

Q: How long will the rechargeable batteries hold their charge?
A: Rechargeable batteries will self-discharging during stand even left unused. The self-discharging rate is depending on the storage temperature. You need to recondition or charge the batteries several times to restore the normal performance, if after long storage. Generally lithium batteries have lower self discharge rate than Ni-MH battery; Ni-MH battery lower than Ni-CD battery.

NEXcell brand batteries do provide a much longer shelf life comparatively among all the battery brands.

Battery symbols and terminologies
V Voltage represents the power level of the battery. Just like the height of a reservoir. For Ni-MH or Ni-Cd batteries, they are 1.2V and the alkaline batteries are 1.5V.
mAh The measurement of battery capacity, mili-ampere hour. The number indicates how long the batteries will last at certain power consumption. The higher mAh batteries will last longer usage time.
mA The measurement of charging or discharging current, mili-ampere.
C The rate at which a battery is charging or discharging. Discharging a battery at 0.2C means to drain the battery capacity completely in five hour. Charging a battery at 1C means to charge the battery fully in one hour. 2C charge means using the rate of twice a battery capacity to charge the battery completely in half hour.
CmA During charging and discharging, CmA is a value indicating current and expressed as a multiple of nominal capacity. Substitute ¡°C¡± with the battery¡¯s nominal capacity when calculating.
Other technical terms:
Parallel charging of batteries
Sufficient care must be taken during the design of the charger when charging batteries connected in parallel. Consult NEXcell when parallel charging is required
Reverse charging
Charging with polarity reversed can cause a reversal in battery polarity causing gas pressure inside the battery to rise, which can activate the safety vent, leading to alkaline electrolyte leakage, rapid deterioration in cell performance, battery swelling to battery bursts. Never attempt reverse charging.
Avoid overcharging. Repeated overcharging can lead to deterioration in battery performance and may cause electrolyte leakage.
Rapid charging
To charge batteries rapidly, use the specified charger or charging method recommended by NEXcell and follow the correct procedures.
Trickle charging (continuous charging at low current)
Carry out trickle charge by applying the current of 0.02 to 0.05 CmA. The correct current value is determined depending on the features and purpose of the equipment. Long term trickle charge is not recommended because it may deteriorate the battery performance.

Latest News

Independent Renewable Electricity Supply System, through the wind/solar hybrid energy management system will come soon.  more info.

LED lights are developed for green power needs. More info.


Lithium power system was put into NEXcell products range, including Lithium-ion, Lithium Polymer, LiFePO4, controlling circuitry and chargersmore info.


NEXcell developed low self discharge, ready to use battery EnergyON: AA, AAA consumer & industrial low self discharge battery. Ready to use Ni-MH battery EnergyON® C 4500mAh, D 9000mAh and 9V 200mAh are available in early 2007 more info.


NEXcell High/ Low Temperature Battery was introduced. Low temperature Two Way Radio Battery available.

High-T battery

Low-T battery

NEXcell consumer battery AA 2700mAh, AAA 1000mAh was put into mass production. more info.

NEXcell introduced unique, smart, fast & battery protective 4-independent channel AA/AAA/9V charger. more info.

¡¡ Products | Store | FAQ | Contact us | Company info

¡¡ ® 1984-2011 Electrochem Automation Inc.
NEXcell is registered trademark of Electrochem Automation Inc. All other trademarks belong to their respective owners.
¡¡ ¡¡