External laptop battery designed specifically for dell latitude business notebooks.
technical specifications:
battery type: rechargeable lithium-ion (li-ion).
capacity: 47 wh (watt-hours) / standard configuration.
voltage: 7.4 v.
primary battery type/model: 3rnfd.
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device compatibility with the following business laptops:
dell latitude e7440 series
dell latitude e7450 series
dell latitude e7420 series
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betri ya laptop dell, battery ya dell latitude, betri ya 3rnfd