Battery Adapter
Tuesday, June 14th, 2011
Battery Adapter
Battery maintenance
Battery maintenance
With the switch to secondary batteries, some level of battery maintenance is require, a service that is best performed with a battery analyzer. Here are some field results on the use of battery (SONY VAIO VGN-FZ Battery)analyzers:
At the conclusion of the Balkan War, the Dutch Army serviced all batteries at the Dutch Military Headquarters using Cadex 7000 Series battery analyzers. The army was aware that the packs were used under the worst possible conditions. Rather than a good daily workout, the NiCds were employed for short patrol duties lasting 2 to 3 hours per day. The rest of the time the batteries remained in the chargers for operational readiness. The batterieswere 2 to 3 years old.
The capacity on some packs had dropped from 100 percent nominal to 30 percent. With the analyzer's recondition function, 9 out of 10 batteries were restored to full service. The Dutch Army sets the target capacity threshold for field acceptability to 80 percent.
The importance of exercising and reconditioning NiCd batteries with a battery analyzer is emphasized by another study carried out for the US Navy by GTE Government Systems in Virginia, USA. To determine the percentage of batteries needing replacement within the first year of use, one group of batteries received charge only (no maintenance), another group was periodically exercised and a third group received recondition. The batteries studied were used for two-way radios on the aircraft carriers USS Eisenhower, USS George Washington, and the destroyer USS Ponce.
With charge only (charge-and-use), the annual percentage of battery failure on the USS Eisenhower was 45 percent (see Figure 4). When applying exercise, the failure rate was reduced to 15 percent. By far the best results were achieved with recondition. The failure rate dropped to 5 percent. Identical results were attained from the USS George Washington and the USS Ponce. Recondition is a secondary discharge that removes the remaining battery (SONY VGP-BPS8 Battery) energy by slowly draining the cells towards zero volts.
Maintenance Method Annual Percentage of Batteries
Requiring Replacement Charge only (charge-and-use, no maintenance) 45% Exercise only (periodic discharge to 1V/cell) 15% Reconditioning (secondary deep discharge) 5%
Figure 4: Replacement rates of NiCd batteries. The need to replace batteries decreases by three and nine-fold respectively when exercise and recondition is applied. These statistics were drawn from batteries used by the US Navy on the USS Eisenhower, USS George Washington and USS Ponce.
The GTE Government System report concluded that a battery analyzer featuring exercise and recondition functions costing $2,500US would return its investment in less than one month on battery savings alone. The report did not address the benefits of increased system reliability, an issue that is of equal if not greater importance, especially when the safety of human lives is at stake.
Battery analyzers are also used to quick-test battery performance. Cadex Electronics has introduced a technique to measure the state-of-health of a battery in three minutes. Based on inference technology, the Cadex Quicktest™ uses battery specific matrices that are derived through a "trend learning" process using artificial intelligence. The ability to self-learn enables the system to adapt to new battery chemistries without changing hardware.
Quicktest™ is available on the Cadex 7200 two-station and the 7400 four-station battery analyzer/ reconditioners. The system accommodates Li-ion, NiMH, NiCd and lead acid batteries; the required charge level is 20 to 90 percent. If outside this range, the analyzer automatically applies a brief charge or discharge. The matrix is stored in the battery adapters that also hold the battery parameters to configure the analyzer. Testing a battery with a properly learned matrix achieves an accuracy of +/-5 percent on most batteries. Popular battery adapters include the matrix at time of purchase. For other batteries, the matrix can be obtained by running the analyzer's Learn program.
Summary
Primary batteries will always be around, if only to run wristwatches, portable entertainment devices and flashlights. While the primaries were once the only practical power source for portable applications, there is a shift towards rechargeables. Ever since Neumann successfully sealed the NiCd battery in 1947, the era of rechargeable batteries had begun. The 1990s brought many improvements in terms of higher energy densities and lower costs. But the portable world is not yet satisfied - we need smaller batteries that last longer.
Will the chemical battery (HP PAVILION DV2000 Battery) retains its status or does the future lie in fuel cell or atomic fusion? Hype put aside, we are still years away from any practical alternative solution.
About the Author
Discount high quality laptop battery for dell, hp, compaq, sony, acer, ibm, toshiba and so on at www.battery-retail.com.Laptop batteries, retail battery, hp laptop battery, acer laptop batteries, sony battery, ibm laptop battery, apple battery, toshiba laptop batteries, fujitsu battery, battery charger.
http://www.battery-retail.com/sony-vgp-bps8-battery.htm
Will anything happen if i plug in a less voltage battery adapter into my laptop?
My laptop takes a 19v battery, can i plug in an 18.5v (or less) battery adapter?
either it wont starts or it ends faster
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Let Us Learn How to Service Cell Phone Batteries
With the move to lithium-ion, fewer cell phone batteries fail during the warranty period than with nickel-based chemistries. Lithium-ion is less temperamental and needs less customer preparation than nickel. Yet, the volume of returned batteries remains relatively high.
A North American cellular provider with about 12 million subscribers receives roughly 70,000 warranty returns per month. Out of these returned handsets, 50% have mechanical failures; 30% are performance related issues; 15% have battery or charger related problems; and 5% have miscellaneous faults.
There are many reasons for the battery failures. The battery may not have been properly charged before use. Perhaps the packs remained on the shelf too long or the charger is not functioning correctly. Lack of battery understanding may also be to blame. The true reason may never be known.
To satisfy the customer and honor warranty obligations, the stores provide a replacement battery, no questions asked. Competition makes it tough to do otherwise. The faulty batteries are then returned to the manufacturer for replacement.
Phone manufacturers are aware that 80-90% of the returned batteries have either no problem or can easily be restored with a battery analyzer. The remaining 10-20% can often be revived by reactivating the safety circuit with a boot program and by applying charge/discharge cycles. Only a small percentage of batteries returned under warranty exhibit non-correctable faults.
Not all batteries and handsets brought in for service fail due to manufacturer's defects. Some batteries get damaged due to dropping and other physical abuse. A Service Manager of a leading cell-phone manufacturer hinted that coffee submersion is a common cause of failure. The acid in the coffee manages to corrode the electrical conductors in the handset and the battery. Coffee submersion occurs when the user accidentally mistakes the cup of coffee with the charger or cradle.
To reduce the flow of warranty goods, some manufacturers began charging $35US for no-fault returns. With the added cost, the dealers had no other option than to continue accepting and replacing returns from fickle customers. Warehouses started to fill with dead merchandise; and in 1997 a critical mass was reached. The cost of exchange, lost time by retail staff, shipping, warehousing and paying a subsidy for a replacement phone became a multi-million dollar problem.
Refurbishing, a cost-effective exercise
In an effort to salvage returned batteries, some mobile phone manufacturers segregate battery packs according to purchase date. Packs returned within the thirty-day warranty period are marked type 'B'. The batteries are then consolidated and sent to a regional service center where they are serviced. Batteries that are clean, (have no coffee residue) and regain a capacity of 80% or higher, are relabeled and sold at a discount price. The refurbishing program reclaims over 90% of the returned batteries.
On the strength of the success, some battery-refurbishing houses have extended the service to include batteries that are up to one year old. Repairing these older packs yields a 40-70% restoration rate. Managers have indicated that effectively run battery refurbishing centers manage to generate a profit. Equally importantly is the environmental benefit in restoring rather than disposing of a nokia battery.
Storefront battery service
Servicing a batteries at point-of-sale is becoming a viable alternative to sending the pack to central service centers. With storefront service, the pack goes no further than to the store that sold the product. The batteries are tested, repackaged, and made ready for the next customer with a battery problem. This eliminates courier charges and relieves the warranty obligation by the manufacturers.
Modern battery analyzers are equipped with rapid-test programs that assess the battery state-of-health in a few minutes. Some analyzers (Cadex) offer a boost program to wake up seemingly dead batteries because regular chargers can no longer recharge these packs. The service takes only a few minutes.
How does a battery fall asleep? A lithium-ion may become dysfunctional if discharged too deeply without applying a recharge after use. The boost program applies a gentle charge current to reactivate the battery's safety circuit. A fast-charge follows. To demonstrate the effectiveness of boost, 27 of 92 returned lithium-ion batteries were permanently restored with the boost function of a battery analyzer (Cadex C7400) at the Cadex test laboratory.
If a pack requires a complete service of priming and reconditioning, the customer is asked to come back later. Alternatively, a refurbished battery can be given as a replacement. Only batteries with mechanical defects or those with non-correctable electrical problems need replacement.
Connecting the battery to the analyzer has been a major challenge for customer service staff. Setting the correct battery parameters and selecting a program is another hurdle. If a store handles a limited number of phones or if trained staff is not available, custom battery adapters are the answer. Custom adapters are made for a specific battery type and allow easy insertion of the battery. A wrong connection is not possible. Because of the firm contact provided between battery and analyzer, the custom adapters produce the most accurate readings, especially on rapid-testing. (Cadex offers the SnapLock custom adapters that automatically configure the analyzer to the correct setting.)
Service technicians dealing with a multitude of batteries may prefer a universal battery adapter. This requires programming the battery analyzer to the correct battery chemistry, voltage and milliampere rating. Once set, these parameters can be stored in those adapters equipped with a memory chip. (The Cadex adapters hold up to 10 battery configuration codes. If more storage is needed, a PC with BatteryShop™ software will be required. With a PC, the user can program the analyzer by clicking the mouse on the selected battery.)
Why was storefront service not done earlier?
Point-of-sale service has only become feasible with modern, easy-to-use battery analyzers. Older units were designed for trained technicians and engineers. The programs consisted of cycling to remove the 'memory' on nickel-based batteries. Lithium-ion no longer suffers from memory and cycling has little effect in improving this battery chemistry.
Today, customers want fast service and are not prepared to wait for long service procedures. Neither can the equipment be tied up for any length of time. One of the key features of the modern battery analyzer is the ability to assess the battery quickly and apply the needed repairs in minutes rather than hours.
Offering HTC battery test service at storefronts improves customer service and enhances overall customer satisfaction. Organizations using modern battery analyzers have reported sharp reductions in service related expenses. Manufacturers support storefront service and often furnish the participating dealers with battery analyzers of choice. This trend is growing. With camera phones and increasing use of data transmissions, the battery is becoming a critical part in the overall performance of a cell phone.
About the Author
ibuynow offer high quality hp laptop batteries such as hp pavilion dv6 battery, hp pavilion dv7 battery, hp pavilion dv8 battery. All products are new with 1 Year Warranty!
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Battery Adapter