Updated 17 Aug 2016

Arlec

Rechargeable CPCD1392

Bottom line: The Arlec Rechargeable CPCD1392 has good battery life per use. But its long-term endurance is just OK and its charge retention is extremely poor.

Rechargeable CPCD1392
Consumer score
55
Avg price

$4.98

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Test results

Overall score
OK
55
Battery life
Good
78%
Long term endurance
Just OK
53%
Charge retention
Extremely poor
10%
Ruggedness
OK
59%

Good points

  • Good battery life per use.
  • Fairly rugged construction.

But

  • Just OK long-term endurance.
  • Extremely poor charge retention.

How we test

We place the batteries in a computer-controlled test rig that charges them, then discharges them at a rate equivalent to the demand of a high-drain device — like a remote-controlled car. Once the cell voltage reaches 1.0V, equivalent to empty for most power-hungry devices, the rig charges them again.

  • We judge each battery’s long term endurance by measuring how many cycles until its capacity falls to half its initial value.
  • The battery’s average capacity over the amount of charge/discharge cycles before failure gives our battery life per use score.
  • Rechargeable batteries gradually lose charge while sitting idle. We measured this rate of “self-discharge” for each battery to get our charge retention in storage score.
  • We also look at the ruggedness of each battery’s construction by placing them in a rotating cylinder (a bit like a gentle tumble-dryer) for 24 hours, before taking them out and sorting them from least to most damaged.

Key data

Product

Avg price
$4.98

Specifications

Type
NiMH
Cycles to failure
83
Total lifetime capacity (mAh)
169000
Measured initial capacity (mAh)
2155
Average capacity (mAh)
1610
Average discharge time (min)
98
Annual charge loss in storage (%)
105