Frequently Asked Questions

What is self-discharge?2019-01-12T22:11:32+08:00
“Self-discharge” can refer to the shelf-life of a primary cell or the rate of loss of charge in a rechargeable battery. A battery is said to be “no good” when cannot deliver at least 60-80% of its rated capacity, depending on the battery type.
* Many primary cells will last for many years in storage at room temperature:
    * Carbon cells last about two to three years on the shelf
    * High quality alkaline cells should generally last 10 years
    * Lithium cells can last for ten years or more depending on the type
* Rechargeable or secondary batteries lose their charge more quickly when in storage:
    * Lead acid batteries will last about six months
    * Lithium ion batteries are best stored at a partial state of charge (30-50%), and self-discharge about 2-4% every month
    * NiCd cells generally maintain 80% capacity for about 30 days
    * Some types of NiMH batteries can lose their charge in three to four weeks
Note: Higher ambient temperatures during storage will significantly reduce the shelf life of all batteries.
Primary vs. secondary batteries: What’s the difference?2019-01-12T22:07:32+08:00
* Primary batteries are “one time use” batteries. Once the chemical reaction between the cell’s electrode materials has ended, the cell loses its ability to produce energy. It must be removed and replaced with a fresh cell/battery.
* Secondary batteries are “rechargeable batteries”. The chemical reaction that takes place within the cell is reversible and repeatable for hundreds or thousands of cycles, depending on the chemistry.
What is the warranty policy for a X-Engeria Battery?2019-01-12T21:57:11+08:00
The warranty time frame and terms are  specified by X-Engeria, normal 1 year to motorcycle battery, 2years to industry battery. If you want to know the detail warrant policy, please contact us.
What does “VRLA”, “MF”, “AGM”, and “SLA” stand for?2019-01-12T21:47:23+08:00
All 4 of these terms basically refer to the same type of battery. An example of this would be the E-engeria YTX series. These batteries are typically all black in color:
VRLA: Valve Regulated Lead Acid
MF: Maintenance-Free “
AGM: Absorbed Glass Mat
SLA: Sealed Lead Acid.
Amp-Hours – What Are They?2019-01-12T21:45:43+08:00
All deep cycle batteries are rated in amp-hours. An amp-hour is one amp for one hour, or 10 amps for 1/10 of an hour and so forth. It is amps x hours. If you have something that pulls 20 amps, and you use it for 20 minutes, then the amp-hours used would be 20 (amps) x .333 (hours), or 6.67 AH. The generally accepted AH rating time period for batteries used in solar electric and backup power systems (and for nearly all deep cycle batteries) is the “20 hour rate”. (Some, such as the Concorde AGM, use the 24 hour rate, which is probably a better real-world rating).  This means that it is discharged down to 10.5 volts over a 20 hour period while the total actual amp-hours it supplies is measured. Sometimes ratings at the 6 hour rate and 100 hour rate are also given for comparison and for different applications. The 6-hour rate is often used for industrial batteries, as that is a typical daily duty cycle. Sometimes the 100 hour rate is given just to make the battery look better than it really is, but it is also useful for figuring battery capacity for long-term backup amp-hour requirements.
What’s temperature Effects on Batteries?2019-01-12T21:44:37+08:00
Battery capacity (how many amp-hours it can hold) is reduced as temperature goes down, and increased as temperature goes up. This is why your car battery dies on a cold winter morning, even though it worked fine the previous afternoon. If your batteries spend part of the year shivering in the cold, the reduced capacity has to be taken into account when sizing the system batteries. The standard rating for batteries is at room temperature – 25 degrees C (about 77 F). At approximately -22 degrees F (-27 C), battery AH capacity drops to 50%. At freezing, capacity is reduced by 20%. Capacity is increased at higher temperatures – at 122 degrees F, battery capacity would be about 12% higher.
Battery charging voltage also changes with temperature. It will vary from about 2.74 volts per cell (16.4 volts) at -40 C to 2.3 volts per cell (13.8 volts) at 50 C. This is why you should have temperature compensation on your charger or charge control if your batteries are outside and/or subject to wide temperature variations. Some charge controls have temperature compensation built in (such as Morningstar) – this works fine if the controller is subject to the same temperatures as the batteries. However, if your batteries are outside, and the controller is inside, it does not work that well. Adding another complication is that large battery banks make up a large thermal mass.
Thermal mass means that because they have so much mass, they will change internal temperature much slower than the surrounding air temperature. A large insulated battery bank may vary as little as 10 degrees over 24 hours internally, even though the air temperature varies from 20 to 70 degrees. For this reason, external (add-on) temperature sensors should be attached to one of the POSITIVE plate terminals, and bundled up a little with some type of insulation on the terminal. The sensor will then read very close to the actual internal battery temperature.
Even though battery capacity at high temperatures is higher,  battery life is shortened. Battery capacity is reduced by 50% at -22 degrees F – but battery LIFE increases by about 60%. Battery life is reduced at higher temperatures – for every 15 degrees F over 77, battery life is cut in half. This holds true for ANY type of Lead-Acid battery, whether sealed, gelled, AGM, industrial or whatever. This is actually not as bad as it seems, as the battery will tend to average out the good and bad times. Click on the small graph to see a full size chart of temperature vs capacity.
One last note on temperatures – in some places that have extremely cold or hot conditions, batteries may be sold locally that are NOT standard electrolyte (acid) strengths. The electrolyte may be stronger (for cold) or weaker (for very hot) climates. In such cases, the specific gravity and the voltages may vary from what we show.
How long is a battery lifespan?2019-01-12T21:43:10+08:00
The lifespan of a deep cycle battery will vary considerably with how it is used, how it is maintained and charged, temperature, and other factors. It can vary to extremes – we have seen L-16’s killed in less than a year by severe overcharging and water loss, and we have a large set of surplus telephone batteries that see only occasional (10-15 times per year) heavy service that was just replaced after 35+ years. We have seen gelled cells destroyed in one day when overcharged with a large automotive charger. We have seen golf cart batteries destroyed without ever being used in less than a year because they were left sitting in a hot garage or warehouse without being charged. Even the so-called “dry charged” (where you add acid when you need them) have a shelf life of 18 months at most. (They are not totally dry – they are actually filled with acid, the plates formed and charged, then the acid is dumped out).
These are some typical (minimum-maximum) expectations for batteries if used in deep cycle service. There are so many variables, such as depth of discharge, maintenance, temperature, how often and how deep cycled, etc. that it is almost impossible to give a fixed number.
  • Starting: 3-12 months
  • Marine: 1-6 years
  • Golf cart: 2-7 years
  • AGM deep cycle: 4-8 years
  • Gelled deep cycle: 2-5 years
  • Deep cycle (L-16 type etc): 4-8 years
  • Rolls-Surrette premium deep cycle: 7-15 years
  • Industrial deep cycle (Crown and Rolls 4KS series): 10-20+ years.
  • Telephone (float): 2-20 years. These are usually special purpose “float service”, but often appear on the surplus market as “deep cycle”. They can vary considerably, depending on age, usage, care, and type.
  • NiFe (alkaline): 5-35 years
  • NiCad: 1-20 years
What does deep cycles battery  mean?  What’s the application it used for?2019-01-12T21:42:23+08:00
Marine applications, golf buggies, fork lift trucks and electric vehicles use deep cycle batteries which are designed to be completely discharged before recharging. Because charging causes excessive heat which can warp the plates, thicker and stronger or solid plate grids are used for deep cycling applications. Normal automotive batteries are not designed for repeated deep cycling and use thinner plates with a greater surface area to achieve high current carrying capacity.
Automotive batteries will generally fail after 30-150 deep cycles if deep cycled, while they may last for thousands of cycles in normal starting use (2-5% discharge).
If batteries designed for deep cycling are used for automotive applications they must be “oversized” by about 20% to compensate for their lower current carrying capacity.
What does a starting  Battery mean?2019-01-12T21:41:25+08:00
Starting (sometimes called SLI, for starting, lighting, ignition) batteries are commonly used to start and run engines. Engine starters need a very large starting current for a very short time. Starting batteries have a large number of thin plates for maximum surface area. The plates are composed of a Lead “sponge”, similar in appearance to a very fine foam sponge. This gives a very large surface area, but if deep cycled, this sponge will quickly be consumed and fall to the bottom of the cells. Automotive batteries will generally fail after 30-150 deep cycles if deep cycled, while they may last for thousands of cycles in normal starting use (2-5% discharge).
What does AGM Absorbed Glass Mat Battery mean?2019-01-12T21:40:38+08:00
Also known as Absorptive Glass Micro-Fibre
Used in VRLA batteries the Boron Silicate fibreglass mat which acts as the separator between the electrodes and absorbs the free electrolyte acting like a sponge. Its purpose is to promote recombination of the hydrogen and oxygen given off during the charging process. No silica gel is necessary. The fibreglass matt absorbs and immobilises the acid in the matt but keeps it in a liquid rather than a gel form. In this way the acid is more readily available to the plates allowing faster reactions between the acid and the plate material allowing higher charge/discharge rates as well as deep cycling.
This construction is very robust and able to withstand severe shock and vibration and the cells will not leak even if the case is cracked.
AGM batteries are also sometimes called “starved electrolyte” or “dry”, because the fibreglass mat is only 95% saturated with Sulfuric acid and there is no excess liquid.
Nearly all AGM batteries are sealed valve regulated “VRLA”.
AGM’s have a very low self-discharge rate of from 1% to 3% per month
What does Valve Regulated Lead Acid (VRLA) Batteries mean?2019-01-12T21:39:34+08:00
Also called Sealed Lead Acid (SLA) batteries.
This construction is designed to prevent electrolyte loss through evaporation, spillage and gassing and this in turn prolongs the life of the battery and eases maintenance. Instead of simple vent caps on the cells to let gas escape, VRLA have pressure valves that open only under extreme conditions. Valve-regulated batteries also need an electrolyte design that reduces gassing by impeding the release to the atmosphere of the oxygen and hydrogen generated by the galvanic action of the battery during charging. This usually involves a catalyst that causes the hydrogen and oxygen to recombine into water and is called a recombinant system. Because spillage of the acid electrolyte is eliminated the batteries are also safer.
How Does a Lead-Acid Battery Work?2019-01-12T21:38:02+08:00

Lead-Acid Battery

Batteries use a chemical reaction to do work on charge and produce a voltage between their output terminals.

The reaction of lead and lead oxide with the sulfuric acid electrolyte produces a voltage. The supplying of energy to and external resistance discharges the battery.
The reaction of lead and lead oxide with the sulfuric acid electrolyte produces a voltage. The supplying of energy to and external resistance discharges the battery.
How long should a motorcycle battery last?2019-01-12T21:29:10+08:00
Many factors affect the life of a battery:
Climate: Colder climates tend to be hard on batteries from a starting standpoint, and for the fact that many people put their bikes away for the season when not using. Sometimes without charging properly. Hotter climates tend to discharge batteries quicker, and dry out batteries quicker. “Average” climates are the best for long battery life.
Usage: A battery that is used every day has the most chance of living a long life. Batteries that sit a lot, many times are neglected. This shortens overall life. Periodic charging is the best defense.
Application: How well is the battery charged in the vehicle? Some vehicles have better charging systems than others. Older bikes have worse charging systems than new ones. Are there a lot of extra accessories on your vehicle? Sometimes a battery has a hard time keeping up with additional electrical drains, thus wearing it out quicker.
Negative Factors:
Sulfation: A build up of crystals on the plates of a battery. This comes from not charging a battery properly. The more sulfation that builds up, the harder the battery is to charge, until finally it does not charge at all.
Water Loss: Can come from overcharging, or just simple evaporation over time. This only happens with conventional batteries. This does not happen with sealed AGM batteries. Once the plates of a battery are left open to the air, above the fluid level, they can corrode very quickly. Corrosion can cause an internal short, and very quickly destroy the battery. Keeping proper water levels maintained is very important.
Lack of Charging: As mentioned previously, lack of proper charging is the main reason that a battery will not last as long as it should. At the very minimum, a battery should be charged once a month if left unused.
Complete Drain: Have you ever left your key on, and totally killed the battery? If recovered in a short time period, the battery should charge back to 100%. But every time this happens, it is similar to the battery having a “heart attack”, and shortening its overall life. Always turn your vehicle off with the keyed ignition switch, not the “kill switch”.
Better Battery Choice:
AGM: Sealed AGM batteries typically last 3 to 5 years on average. 6 to 8 years is easily obtainable with proper maintenance. Typically sealed AGM batteries will give warning before completely dying. They will start slower, and require more charging. This is your clue to replace the battery. Typically they do not fail all of a sudden.
Conventional: Conventional “acid-filled” batteries have a harder life, for many of the reasons listed above. Conventional batteries typically only last 2 to 3 years on average. Although, 4 to 5 years is possible, in the best environments, and with excellent maintenance.
What’s the meaning of “cycle use” and “standby use”?2019-01-10T18:06:28+08:00

“Cycle Use” – direct power source:
Cycle Use It can provide the power supply to power tools, and portable electronic products. It can also be used for cycling charging and discharging usage such as electronics motorbike or vacuum cleaner.
“Standby Use” – back up power:
Standby Use is mainly used for emergency power to avoid future damage that may be caused by a sudden power outage.

What is the payment terms2019-01-10T16:57:49+08:00

We normal 30%  deposit ,70% balance

We accept FOB ,CIF terms.

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