Esperanza Rainbow power strip

Cheap ($5-$6) power strip with 5 sockets with individual switches and main switch with neon lights.

 Two types of security screws, fortunately not too tight

 All switches are the same. One issue I have with them (I own two power strips of this kind) is neon lights fading with time on some (but not all, so it is uneven) switches.

 Some wires are soldered with copper. Soldering seems fine overall.

 Not fused. Single protection element: 14D471K MOV (50A current class, 4500A max peak current, 125J max energy, 516pF).

Nokia AC-3E charger

Nokia AC-3E charger with thin plug.
Nominal output: 5V/350mA.
Measured output voltage: 8.25V at no load. Newer AC-11E (5V/450mA, slightly smaller) charger have similar voltage.

 "Energy star" sticker on the cable

 Two three wings screws at top - not complaining, at least it is not clued together.

PCB: PSM1075AN REV-A A7

 AC input is connected with spring contacts directly to PCB

 Date: 2011.08

 Using LNK5640N controller

Dell VV0NF battery

Dell VV0NF battery disassembly.
This is battery for Dell Latitude E5440 laptop. I've got for free (uknown condition), unfortunately it seems to be mechanically incompatible with battery for E6440 I own (N3X1D). This is real shame, as they have almost identical dimensions and same electric connector in the same location - just plastic shell is slightly different.
Here are few photos from disassembly, including latches location.

 Back of the shell is flexible and relatively easy to pry.

 Moving to the front.

 Cells are clued to the bottom with double sided tape.

 BQ8050-D1 controller

 Thermistor clued to the cell in the middle.

Despite trying to be careful I've damaged one capacitor on the PCB.

 Unfortunately battery doesn't seem to be recognized by E6440 - I don't know if is faulty or if it is by design.

USB to RS485 converter

Cheap USB to RS485 converter.
I've tested it successfully with https://sourceforge.net/projects/qmodmaster/ and MODBUS slaves using ST3485 on the other side.

MAX485 - probably counterfeit.
USB chip - no markings but recognized as CH340

Cheap E27 10W LED light bulb

Cheap POLAMP 05/14, 230V, 10W LED light bulb, E27, "warm" white.

 Disassembled after failure - intermitting flickering and no operation at all.

I wasn't able to remove glass cleanly. Removing metal E27 connector is also hard without damaging plastic.
All (17) LED chips are connected in series on aluminum PCB.
Each LED chip has apparently 3 junctions connected in series. Forward voltage: 7.85V at 4mA.

 Aluminum radiator inside plastic part.

 Transformatorless power supply.

PCB: A55-230V-DY 120613

 4.7u/400V filter capacitor.

I think this cracked solder joint at serial resistor was actual cause of failure and not result of disassembly.