The replacement 40wh battery is Model Name: Standard Rechargeable Li-ion battery Type XCMRD; Battery Type: Li-ion; Voltage : 14.8V; Capacity : 40Wh; Condition : New; Life span: About 300-500 discharge per charge cycle.
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The 14 3421 battery is with is CE FCC RoHS Certified and built-in circuit protection ensures battery both safety and stability. Offer Over-charge & over-discharge& short circuit protection. Everything will let your use the replacement safe and reliable.