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KAPILKDEV

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Posts posted by KAPILKDEV

  2. Posted · Report reply

    :previous:

    Friend srijaga_cbe, don't know whether it is OMH or not. Sellers are advertising that it can be used with Reliance and Tata CDMA services, so it is surely a network unlocked handset. Seeing it's specifications I think it is worth to buy. But compared to guru559 it has a lower capacity battery, ie 559 has 1300mAh battery while 539 has only 1000mAh battery. Please see this link that one seller in ebay says that it can be used in reliance and tata http://cgi.ebay.in/New-Samsung-Guru-539-CDMA-Mobile-Phone-3-5mmJack-/180705671168?pt=IN_Mobile_Phones&hash=item2a12e5b800

  3. Posted · Report reply

    I think it is true. In Kerala RCDMA and Tata indicom are only dealing with EVDO data cards, they are even terminated 1x data card business, all reliance CDMA shops are now dealing with GSM products, all true value shops and true value hubs of tata indicom are closed, a few existing tata shops are converted to docomo 3G experience zones, no good bundled CDMA handsets are available in the mobile shops except the low cost models, no recharge coupons are available anywhere except a few shops in major cities that too Rs 10 & Rs 20 only, large coupons like Rs 50 & Rs 100 became extinct, no new CDMA tower, existing CDMA towers are loaded with GSM transceivers, no advertisement in media. But the consolatory thing is that new MTS stores are opening everywhere, they are doing good CDMA business.

  11. Posted · Report reply

    Friend, there are 2 types of batteries and chargers; NiCad (Nickel Cadmium) and NiMH (Nickel Metal Hydride). If you have NiCad batteries, you should use Nicad battery charger and if you have NiMH batteries, use NiMH battery charger. NiCad batteries have a capacity below 1000mAh (milli Ampere Hour = 1/1000 Ampere Hour) and NiMH batteries have capacity above 2000mAH. mAH indicates the charge storing capacity of the battery. For example 700mAH battery means it can deliver 0.7 Ampere of current (700 milli ampere) for one hour and a 2200 mAH battery means it can deliver 2.2 Ampere current for one hour. Both these batteries should charge at a current rate of 1/10th of it's capacity or lower . That means if the battery capacity is 700mAH, it can charge with a current up to 70 milli ampere (0.07 Ampere); if the battery capacity is 2200mAH, it can charge with a current up to 220mAH (0.22 Ampere). If we are charging with more than this current, suppose charging a 700mAH battery with 500 mA current, the battery will damage soon. If we are charging a battery with lower current, suppose charging a 700mAH battery with 35 milli Ampere current no damage will cause to the battery except it will take double the time to get it fully charged. To find the charging time of a fully discharged battery, use this formula [battery capacity / charging current] * 1.4 The factor 1.4 is to compensate the charging loss, in other words battery charging has only 70% efficiency, 30% charging power is lost as heat, to compensate the loss we should add a 40% extra charging 'time'. So if we are charging a battery with it's 1/10th current, it will take 10 hours to get fully charged but owing to the losses it will take about 14 hours to fill (a simple example is think a 500 liter tank is filling with water at the rate of 50 liter per hour; it will take 10 hours to fill but if the pumping line has some leaks it will take more than 10 hours to fill) , if we have a 2200 mAH fully discharged battery and a 70mA charger using this formula it will take 44 hours to take fully charged (2200/70 = 31.43, 31.43*1.4 = 44). The battery we are using in our mobile phones are Lithium ion and it can charge at 1/2 of it's current rate, but Nicad and NiMH batteries should charge at 1/10 of it's current rate.

  12. Posted · Report reply

    Spice c3300 and Micromax c114 are the same chinese phone with different external designs. All components and specifications are the same. I think better to go for Micromax c114 however it is a bit costlier as it is unlocked and can use any CDMA uim. Spice c3300 is locked with Tata Indicom. Battery of most of these brands last only for about 6 months, after 6 months the battery capacity is seems reduced, but not a problem if we get spare battery from manufactures like ERD, AKITA, TAFE etc which will last longer than the original battery.

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