<s>
Trickle	B-Algorithm
charging	I-Algorithm
means	O
charging	B-Application
a	O
fully	O
charged	O
battery	O
at	O
a	O
rate	O
equal	O
to	O
its	O
self-discharge	B-Algorithm
rate	O
,	O
thus	O
enabling	O
the	O
battery	O
to	O
remain	O
at	O
its	O
fully	O
charged	O
level	O
;	O
this	O
state	O
occurs	O
almost	O
exclusively	O
when	O
the	O
battery	O
is	O
not	O
loaded	O
,	O
as	O
trickle	B-Algorithm
charging	I-Algorithm
will	O
not	O
keep	O
a	O
battery	O
charged	O
if	O
current	O
is	O
being	O
drawn	O
by	O
a	O
load	O
.	O
</s>
<s>
A	O
battery	O
under	O
continuous	O
float	B-Algorithm
voltage	I-Algorithm
charging	B-Application
is	O
said	O
to	O
be	O
float-charging	O
.	O
</s>
<s>
For	O
lead-acid	O
batteries	O
under	O
no	O
load	O
float	B-Algorithm
charging	I-Algorithm
(	O
such	O
as	O
in	O
SLI	B-Algorithm
batteries	I-Algorithm
)	O
,	O
trickle	B-Algorithm
charging	I-Algorithm
happens	O
naturally	O
at	O
the	O
end-of-charge	O
,	O
when	O
the	O
lead-acid	O
battery	O
internal	O
resistance	O
to	O
the	O
charging	B-Application
current	O
increases	O
enough	O
to	O
reduce	O
additional	O
charging	B-Application
current	O
to	O
a	O
trickle	O
,	O
hence	O
the	O
name	O
.	O
</s>
<s>
In	O
such	O
cases	O
,	O
the	O
trickle	B-Algorithm
charging	I-Algorithm
equals	O
the	O
energy	O
expended	O
by	O
the	O
lead-acid	O
battery	O
splitting	O
the	O
water	O
in	O
the	O
electrolyte	O
into	O
hydrogen	O
and	O
oxygen	O
gases	O
.	O
</s>
<s>
In	O
that	O
case	O
,	O
supervisory	O
circuits	O
(	O
sometimes	O
called	O
battery	B-Algorithm
management	I-Algorithm
system	I-Algorithm
)	O
adjust	O
electrical	O
conditions	O
during	O
charging	B-Application
to	O
match	O
the	O
requirements	O
of	O
the	O
battery	O
chemistry	O
.	O
</s>
<s>
For	O
Li-ion	O
batteries	O
generally	O
,	O
and	O
for	O
some	O
variants	O
especially	O
,	O
failure	O
to	O
accommodate	O
the	O
limitations	O
of	O
the	O
chemistry	O
and	O
electro-chemistry	O
of	O
a	O
cell	O
,	O
with	O
regard	O
to	O
trickle	B-Algorithm
charging	I-Algorithm
after	O
reaching	O
a	O
fully	O
charged	O
state	O
,	O
can	O
lead	O
to	O
overheating	O
and	O
,	O
possibly	O
to	O
fire	O
or	O
explosion	O
.	O
</s>
